From b2c5198b1996c9053c1bae38755f76125c8cb169 Mon Sep 17 00:00:00 2001
From: Etienne Dechamps <etienne.dechamps@ovh.net>
Date: Tue, 17 Jul 2012 11:23:09 +0200
Subject: [PATCH 1/6] Don't build packages that haven't been selected.

Currently, when configure --with-config is used, selective compilation
is only effective for the simple "make" case. Package builders (e.g.
make rpm) still build everything (utils and modules). This patch fixes
that.

Signed-off-by: Prakash Surya <surya1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #851
---
 Makefile.in    | 80 ++++++++++++++++++++++++--------------------------
 config/arch.am |  4 +++
 config/deb.am  |  4 +++
 config/rpm.am  | 10 +++++--
 config/tgz.am  |  4 +++
 5 files changed, 59 insertions(+), 43 deletions(-)

diff --git a/Makefile.in b/Makefile.in
index 060299b7f7ec..52946a266d00 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -904,20 +904,18 @@ uninstall-am:
 	tags tags-recursive uninstall uninstall-am
 
 srpm-modules:
-	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}-modules" srpm-common
+@CONFIG_KERNEL_TRUE@	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}-modules" srpm-common
 
 srpm-utils:
-	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}" srpm-common
+@CONFIG_USER_TRUE@	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}" srpm-common
 
 srpm: srpm-modules srpm-utils
 
 rpm-modules: srpm-modules
-	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}-modules" rpm-common
+@CONFIG_KERNEL_TRUE@	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}-modules" rpm-common
 
 rpm-utils: srpm-utils
-	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}" rpm-common
-
-rpm-modules: srpm-modules
+@CONFIG_USER_TRUE@	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}" rpm-common
 
 rpm: rpm-modules rpm-utils
 
@@ -995,25 +993,25 @@ deb-local:
 	fi)
 
 deb-modules: deb-local rpm-modules
-	name=${PACKAGE}-modules; \
-	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
-	release=`echo ${LINUX_VERSION} | $(SED) -e "s/-/_/g"`; \
-	arch=`$(RPM) -qp $${name}-$${version}.src.rpm --qf %{arch} | tail -1`; \
-	pkg1=$${name}-$${version}_$${release}.$${arch}.rpm; \
-	pkg2=$${name}-devel-$${version}_$${release}.$${arch}.rpm; \
-	fakeroot $(ALIEN) --scripts --to-deb $$pkg1 $$pkg2; \
-	$(RM) $$pkg1 $$pkg2
+@CONFIG_KERNEL_TRUE@	name=${PACKAGE}-modules; \
+@CONFIG_KERNEL_TRUE@	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
+@CONFIG_KERNEL_TRUE@	release=`echo ${LINUX_VERSION} | $(SED) -e "s/-/_/g"`; \
+@CONFIG_KERNEL_TRUE@	arch=`$(RPM) -qp $${name}-$${version}.src.rpm --qf %{arch} | tail -1`; \
+@CONFIG_KERNEL_TRUE@	pkg1=$${name}-$${version}_$${release}.$${arch}.rpm; \
+@CONFIG_KERNEL_TRUE@	pkg2=$${name}-devel-$${version}_$${release}.$${arch}.rpm; \
+@CONFIG_KERNEL_TRUE@	fakeroot $(ALIEN) --scripts --to-deb $$pkg1 $$pkg2; \
+@CONFIG_KERNEL_TRUE@	$(RM) $$pkg1 $$pkg2
 
 deb-utils: deb-local rpm-utils
-	name=${PACKAGE}; \
-	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
-	arch=`$(RPM) -qp $${name}-$${version}.src.rpm --qf %{arch} | tail -1`; \
-	pkg1=$${name}-$${version}.$${arch}.rpm; \
-	pkg2=$${name}-devel-$${version}.$${arch}.rpm; \
-	pkg3=$${name}-test-$${version}.$${arch}.rpm; \
-	pkg4=$${name}-dracut-$${version}.$${arch}.rpm; \
-	fakeroot $(ALIEN) --scripts --to-deb $$pkg1 $$pkg2 $$pkg3 $$pkg4; \
-	$(RM) $$pkg1 $$pkg2 $$pkg3 $$pkg4
+@CONFIG_USER_TRUE@	name=${PACKAGE}; \
+@CONFIG_USER_TRUE@	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
+@CONFIG_USER_TRUE@	arch=`$(RPM) -qp $${name}-$${version}.src.rpm --qf %{arch} | tail -1`; \
+@CONFIG_USER_TRUE@	pkg1=$${name}-$${version}.$${arch}.rpm; \
+@CONFIG_USER_TRUE@	pkg2=$${name}-devel-$${version}.$${arch}.rpm; \
+@CONFIG_USER_TRUE@	pkg3=$${name}-test-$${version}.$${arch}.rpm; \
+@CONFIG_USER_TRUE@	pkg4=$${name}-dracut-$${version}.$${arch}.rpm; \
+@CONFIG_USER_TRUE@	fakeroot $(ALIEN) --scripts --to-deb $$pkg1 $$pkg2 $$pkg3 $$pkg4; \
+@CONFIG_USER_TRUE@	$(RM) $$pkg1 $$pkg2 $$pkg3 $$pkg4
 
 deb: deb-modules deb-utils
 tgz-local:
@@ -1026,24 +1024,24 @@ tgz-local:
 	fi)
 
 tgz-modules: tgz-local rpm-modules
-	name=${PACKAGE}-modules; \
-	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
-	release=`echo ${LINUX_VERSION} | $(SED) -e "s/-/_/g"`; \
-	arch=`$(RPM) -qp $${name}-$${version}.src.rpm --qf %{arch} | tail -1`; \
-	pkg1=$${name}-$${version}_$${release}.$${arch}.rpm; \
-	pkg2=$${name}-devel-$${version}_$${release}.$${arch}.rpm; \
-	fakeroot $(ALIEN) --scripts --to-tgz $$pkg1 $$pkg2; \
-	$(RM) $$pkg1 $$pkg2
+@CONFIG_KERNEL_TRUE@	name=${PACKAGE}-modules; \
+@CONFIG_KERNEL_TRUE@	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
+@CONFIG_KERNEL_TRUE@	release=`echo ${LINUX_VERSION} | $(SED) -e "s/-/_/g"`; \
+@CONFIG_KERNEL_TRUE@	arch=`$(RPM) -qp $${name}-$${version}.src.rpm --qf %{arch} | tail -1`; \
+@CONFIG_KERNEL_TRUE@	pkg1=$${name}-$${version}_$${release}.$${arch}.rpm; \
+@CONFIG_KERNEL_TRUE@	pkg2=$${name}-devel-$${version}_$${release}.$${arch}.rpm; \
+@CONFIG_KERNEL_TRUE@	fakeroot $(ALIEN) --scripts --to-tgz $$pkg1 $$pkg2; \
+@CONFIG_KERNEL_TRUE@	$(RM) $$pkg1 $$pkg2
 
 tgz-utils: tgz-local rpm-utils
-	name=${PACKAGE}; \
-	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
-	arch=`$(RPM) -qp $${name}-$${version}.src.rpm --qf %{arch} | tail -1`; \
-	pkg1=$${name}-$${version}.$${arch}.rpm; \
-	pkg2=$${name}-devel-$${version}.$${arch}.rpm; \
-	pkg3=$${name}-test-$${version}.$${arch}.rpm; \
-	fakeroot $(ALIEN) --scripts --to-tgz $$pkg1 $$pkg2 $$pkg3; \
-	$(RM) $$pkg1 $$pkg2 $$pkg3
+@CONFIG_USER_TRUE@	name=${PACKAGE}; \
+@CONFIG_USER_TRUE@	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
+@CONFIG_USER_TRUE@	arch=`$(RPM) -qp $${name}-$${version}.src.rpm --qf %{arch} | tail -1`; \
+@CONFIG_USER_TRUE@	pkg1=$${name}-$${version}.$${arch}.rpm; \
+@CONFIG_USER_TRUE@	pkg2=$${name}-devel-$${version}.$${arch}.rpm; \
+@CONFIG_USER_TRUE@	pkg3=$${name}-test-$${version}.$${arch}.rpm; \
+@CONFIG_USER_TRUE@	fakeroot $(ALIEN) --scripts --to-tgz $$pkg1 $$pkg2 $$pkg3; \
+@CONFIG_USER_TRUE@	$(RM) $$pkg1 $$pkg2 $$pkg3
 
 tgz: tgz-modules tgz-utils
 
@@ -1056,10 +1054,10 @@ sarch-utils:
 sarch: sarch-modules sarch-utils
 
 arch-modules:
-	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}-modules" arch-common
+@CONFIG_KERNEL_TRUE@	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}-modules" arch-common
 
 arch-utils:
-	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}" arch-common
+@CONFIG_USER_TRUE@	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}" arch-common
 
 arch: arch-modules arch-utils
 
diff --git a/config/arch.am b/config/arch.am
index 591013afd10c..da43fe73898e 100644
--- a/config/arch.am
+++ b/config/arch.am
@@ -13,10 +13,14 @@ sarch-utils:
 sarch: sarch-modules sarch-utils
 
 arch-modules:
+if CONFIG_KERNEL
 	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}-modules" arch-common
+endif
 
 arch-utils:
+if CONFIG_USER
 	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}" arch-common
+endif
 
 arch: arch-modules arch-utils
 
diff --git a/config/deb.am b/config/deb.am
index 18b56547bc04..36204b41c742 100644
--- a/config/deb.am
+++ b/config/deb.am
@@ -15,6 +15,7 @@ deb-local:
 	fi)
 
 deb-modules: deb-local rpm-modules
+if CONFIG_KERNEL
 	name=${PACKAGE}-modules; \
 	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
 	release=`echo ${LINUX_VERSION} | $(SED) -e "s/-/_/g"`; \
@@ -23,8 +24,10 @@ deb-modules: deb-local rpm-modules
 	pkg2=$${name}-devel-$${version}_$${release}.$${arch}.rpm; \
 	fakeroot $(ALIEN) --scripts --to-deb $$pkg1 $$pkg2; \
 	$(RM) $$pkg1 $$pkg2
+endif
 
 deb-utils: deb-local rpm-utils
+if CONFIG_USER
 	name=${PACKAGE}; \
 	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
 	arch=`$(RPM) -qp $${name}-$${version}.src.rpm --qf %{arch} | tail -1`; \
@@ -34,5 +37,6 @@ deb-utils: deb-local rpm-utils
 	pkg4=$${name}-dracut-$${version}.$${arch}.rpm; \
 	fakeroot $(ALIEN) --scripts --to-deb $$pkg1 $$pkg2 $$pkg3 $$pkg4; \
 	$(RM) $$pkg1 $$pkg2 $$pkg3 $$pkg4
+endif
 
 deb: deb-modules deb-utils
diff --git a/config/rpm.am b/config/rpm.am
index 41107d5eeb43..c5929833b57f 100644
--- a/config/rpm.am
+++ b/config/rpm.am
@@ -1,18 +1,24 @@
 srpm-modules:
+if CONFIG_KERNEL
 	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}-modules" srpm-common
+endif
 
 srpm-utils:
+if CONFIG_USER
 	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}" srpm-common
+endif
 
 srpm: srpm-modules srpm-utils
 
 rpm-modules: srpm-modules
+if CONFIG_KERNEL
 	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}-modules" rpm-common
+endif
 
 rpm-utils: srpm-utils
+if CONFIG_USER
 	$(MAKE) $(AM_MAKEFLAGS) pkg="${PACKAGE}" rpm-common
-
-rpm-modules: srpm-modules
+endif
 
 rpm: rpm-modules rpm-utils
 
diff --git a/config/tgz.am b/config/tgz.am
index 1c13858ff5cf..1ed09ca40ea6 100644
--- a/config/tgz.am
+++ b/config/tgz.am
@@ -8,6 +8,7 @@ tgz-local:
 	fi)
 
 tgz-modules: tgz-local rpm-modules
+if CONFIG_KERNEL
 	name=${PACKAGE}-modules; \
 	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
 	release=`echo ${LINUX_VERSION} | $(SED) -e "s/-/_/g"`; \
@@ -16,8 +17,10 @@ tgz-modules: tgz-local rpm-modules
 	pkg2=$${name}-devel-$${version}_$${release}.$${arch}.rpm; \
 	fakeroot $(ALIEN) --scripts --to-tgz $$pkg1 $$pkg2; \
 	$(RM) $$pkg1 $$pkg2
+endif
 
 tgz-utils: tgz-local rpm-utils
+if CONFIG_USER
 	name=${PACKAGE}; \
 	version=${ZFS_META_VERSION}-${ZFS_META_RELEASE}; \
 	arch=`$(RPM) -qp $${name}-$${version}.src.rpm --qf %{arch} | tail -1`; \
@@ -26,5 +29,6 @@ tgz-utils: tgz-local rpm-utils
 	pkg3=$${name}-test-$${version}.$${arch}.rpm; \
 	fakeroot $(ALIEN) --scripts --to-tgz $$pkg1 $$pkg2 $$pkg3; \
 	$(RM) $$pkg1 $$pkg2 $$pkg3
+endif
 
 tgz: tgz-modules tgz-utils

From 319a99a3d440480fe9c37f637cb9cac8e0f20ded Mon Sep 17 00:00:00 2001
From: Etienne Dechamps <etienne.dechamps@ovh.net>
Date: Tue, 17 Jul 2012 10:36:43 +0200
Subject: [PATCH 2/6] Make configure builtin-aware.

This patch adds a new option to configure: --enable-linux-builtin. When
this option is used, the following happens:

 - Compilation of kernel modules is disabled.

 - A failure to find UTS_RELEASE is followed by a suggestion to run
   "make prepare" on the kernel source tree.

This patch also adds a new test which tries to compile an empty module
as a basic toolchain sanity test. If it fails and the option was
specified, the error is followed by a suggestion to run "make scripts"
on the kernel source tree.

Signed-off-by: Prakash Surya <surya1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #851
---
 config/kernel.m4    |  30 ++++++-
 config/zfs-build.m4 |  12 ++-
 configure           | 209 +++++++++++++++++++++++++++++++++++++++-----
 3 files changed, 223 insertions(+), 28 deletions(-)

diff --git a/config/kernel.m4 b/config/kernel.m4
index c65c58cc0ff1..2fb3fc91b6c5 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -4,6 +4,7 @@ dnl #
 AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
 	ZFS_AC_KERNEL
 	ZFS_AC_SPL
+	ZFS_AC_TEST_MODULE
 	ZFS_AC_KERNEL_CONFIG
 	ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
 	ZFS_AC_KERNEL_TYPE_FMODE_T
@@ -86,7 +87,7 @@ dnl #
 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
 	modpost=$LINUX/scripts/Makefile.modpost
 	AC_MSG_CHECKING([kernel file name for module symbols])
-	AS_IF([test -f "$modpost"], [
+	AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
 		AS_IF([grep -q Modules.symvers $modpost], [
 			LINUX_SYMBOLS=Modules.symvers
 		], [
@@ -191,7 +192,13 @@ AC_DEFUN([ZFS_AC_KERNEL], [
 		])
 	], [
 		AC_MSG_RESULT([Not found])
-		AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
+		if test "x$enable_linux_builtin" != xyes; then
+			AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
+		else
+			AC_MSG_ERROR([
+	*** Cannot find UTS_RELEASE definition.
+	*** Please run 'make prepare' inside the kernel source tree.])
+		fi
 	])
 
 	AC_MSG_RESULT([$kernsrcver])
@@ -312,6 +319,25 @@ AC_DEFUN([ZFS_AC_SPL], [
 	ZFS_AC_SPL_MODULE_SYMVERS
 ])
 
+dnl #
+dnl # Basic toolchain sanity check.
+dnl #
+AC_DEFUN([ZFS_AC_TEST_MODULE],
+	[AC_MSG_CHECKING([whether modules can be built])
+	ZFS_LINUX_TRY_COMPILE([],[],[
+		AC_MSG_RESULT([yes])
+	],[
+		AC_MSG_RESULT([no])
+		if test "x$enable_linux_builtin" != xyes; then
+			AC_MSG_ERROR([*** Unable to build an empty module.])
+		else
+			AC_MSG_ERROR([
+	*** Unable to build an empty module.
+	*** Please run 'make scripts' inside the kernel source tree.])
+		fi
+	])
+])
+
 dnl #
 dnl # Certain kernel build options are not supported.  These must be
 dnl # detected at configure time and cause a build failure.  Otherwise
diff --git a/config/zfs-build.m4 b/config/zfs-build.m4
index 6bfea51951ce..8e6b13b249f4 100644
--- a/config/zfs-build.m4
+++ b/config/zfs-build.m4
@@ -73,6 +73,11 @@ AC_DEFUN([ZFS_AC_CONFIG], [
 		AS_HELP_STRING([--with-config=CONFIG],
 		[Config file 'kernel|user|all|srpm']),
 		[ZFS_CONFIG="$withval"])
+	AC_ARG_ENABLE([linux-builtin],
+		[AC_HELP_STRING([--enable-linux-builtin],
+		[Configure for builtin in-tree kernel modules @<:@default=no@:>@])],
+		[],
+		[enable_linux_builtin=no])
 
 	AC_MSG_CHECKING([zfs config])
 	AC_MSG_RESULT([$ZFS_CONFIG]);
@@ -93,11 +98,10 @@ AC_DEFUN([ZFS_AC_CONFIG], [
 	esac
 
 	AM_CONDITIONAL([CONFIG_USER],
-	               [test "$ZFS_CONFIG" = user] ||
-	               [test "$ZFS_CONFIG" = all])
+		       [test "$ZFS_CONFIG" = user -o "$ZFS_CONFIG" = all])
 	AM_CONDITIONAL([CONFIG_KERNEL],
-	               [test "$ZFS_CONFIG" = kernel] ||
-	               [test "$ZFS_CONFIG" = all])
+		       [test "$ZFS_CONFIG" = kernel -o "$ZFS_CONFIG" = all] &&
+		       [test "x$enable_linux_builtin" != xyes ])
 ])
 
 dnl #
diff --git a/configure b/configure
index 22687f5197c1..f3a9288b5d6b 100755
--- a/configure
+++ b/configure
@@ -981,6 +981,7 @@ enable_fast_install
 with_gnu_ld
 enable_libtool_lock
 with_config
+enable_linux_builtin
 with_linux
 with_linux_obj
 with_spl
@@ -1643,6 +1644,8 @@ Optional Features:
   --enable-fast-install[=PKGS]
                           optimize for fast installation [default=yes]
   --disable-libtool-lock  avoid locking (might break parallel builds)
+  --enable-linux-builtin  Configure for builtin in-tree kernel modules
+                          [default=no]
   --enable-debug          Enable generic debug support [default=no]
   --enable-debug-dmu-tx   Enable dmu tx validation [default=no]
 
@@ -4839,13 +4842,13 @@ if test "${lt_cv_nm_interface+set}" = set; then
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:4842: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:4845: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:4845: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:4848: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:4848: output\"" >&5)
+  (eval echo "\"\$as_me:4851: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
@@ -6051,7 +6054,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 6054 "configure"' > conftest.$ac_ext
+  echo '#line 6057 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -7904,11 +7907,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7907: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7910: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7911: \$? = $ac_status" >&5
+   echo "$as_me:7914: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8243,11 +8246,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8246: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8249: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:8250: \$? = $ac_status" >&5
+   echo "$as_me:8253: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8348,11 +8351,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8351: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8354: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8355: \$? = $ac_status" >&5
+   echo "$as_me:8358: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -8403,11 +8406,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8406: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8409: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8410: \$? = $ac_status" >&5
+   echo "$as_me:8413: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -11206,7 +11209,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11209 "configure"
+#line 11212 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11302,7 +11305,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11305 "configure"
+#line 11308 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11945,6 +11948,13 @@ if test "${with_config+set}" = set; then
   withval=$with_config; ZFS_CONFIG="$withval"
 fi
 
+	# Check whether --enable-linux-builtin was given.
+if test "${enable_linux_builtin+set}" = set; then
+  enableval=$enable_linux_builtin;
+else
+  enable_linux_builtin=no
+fi
+
 
 	{ $as_echo "$as_me:$LINENO: checking zfs config" >&5
 $as_echo_n "checking zfs config... " >&6; }
@@ -12183,9 +12193,19 @@ else
 
 		{ $as_echo "$as_me:$LINENO: result: Not found" >&5
 $as_echo "Not found" >&6; }
-		{ { $as_echo "$as_me:$LINENO: error: *** Cannot find UTS_RELEASE definition." >&5
+		if test "x$enable_linux_builtin" != xyes; then
+			{ { $as_echo "$as_me:$LINENO: error: *** Cannot find UTS_RELEASE definition." >&5
 $as_echo "$as_me: error: *** Cannot find UTS_RELEASE definition." >&2;}
    { (exit 1); exit 1; }; }
+		else
+			{ { $as_echo "$as_me:$LINENO: error:
+	*** Cannot find UTS_RELEASE definition.
+	*** Please run 'make prepare' inside the kernel source tree." >&5
+$as_echo "$as_me: error:
+	*** Cannot find UTS_RELEASE definition.
+	*** Please run 'make prepare' inside the kernel source tree." >&2;}
+   { (exit 1); exit 1; }; }
+		fi
 
 fi
 
@@ -12205,7 +12225,7 @@ $as_echo "$kernsrcver" >&6; }
 	modpost=$LINUX/scripts/Makefile.modpost
 	{ $as_echo "$as_me:$LINENO: checking kernel file name for module symbols" >&5
 $as_echo_n "checking kernel file name for module symbols... " >&6; }
-	if test -f "$modpost"; then
+	if test "x$enable_linux_builtin" != xyes -a -f "$modpost"; then
 
 		if grep -q Modules.symvers $modpost; then
 
@@ -12394,6 +12414,74 @@ $as_echo "$SPL_SYMBOLS" >&6; }
 
 
 
+	{ $as_echo "$as_me:$LINENO: checking whether modules can be built" >&5
+$as_echo_n "checking whether modules can be built... " >&6; }
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build
+	echo "obj-m := conftest.o" >build/Makefile
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+		if test "x$enable_linux_builtin" != xyes; then
+			{ { $as_echo "$as_me:$LINENO: error: *** Unable to build an empty module." >&5
+$as_echo "$as_me: error: *** Unable to build an empty module." >&2;}
+   { (exit 1); exit 1; }; }
+		else
+			{ { $as_echo "$as_me:$LINENO: error:
+	*** Unable to build an empty module.
+	*** Please run 'make scripts' inside the kernel source tree." >&5
+$as_echo "$as_me: error:
+	*** Unable to build an empty module.
+	*** Please run 'make scripts' inside the kernel source tree." >&2;}
+   { (exit 1); exit 1; }; }
+		fi
+
+
+
+fi
+
+	rm -Rf build
+
+
+
 
 
 	if test "$ZFS_META_LICENSE" = GPL; then
@@ -18902,9 +18990,19 @@ else
 
 		{ $as_echo "$as_me:$LINENO: result: Not found" >&5
 $as_echo "Not found" >&6; }
-		{ { $as_echo "$as_me:$LINENO: error: *** Cannot find UTS_RELEASE definition." >&5
+		if test "x$enable_linux_builtin" != xyes; then
+			{ { $as_echo "$as_me:$LINENO: error: *** Cannot find UTS_RELEASE definition." >&5
 $as_echo "$as_me: error: *** Cannot find UTS_RELEASE definition." >&2;}
    { (exit 1); exit 1; }; }
+		else
+			{ { $as_echo "$as_me:$LINENO: error:
+	*** Cannot find UTS_RELEASE definition.
+	*** Please run 'make prepare' inside the kernel source tree." >&5
+$as_echo "$as_me: error:
+	*** Cannot find UTS_RELEASE definition.
+	*** Please run 'make prepare' inside the kernel source tree." >&2;}
+   { (exit 1); exit 1; }; }
+		fi
 
 fi
 
@@ -18924,7 +19022,7 @@ $as_echo "$kernsrcver" >&6; }
 	modpost=$LINUX/scripts/Makefile.modpost
 	{ $as_echo "$as_me:$LINENO: checking kernel file name for module symbols" >&5
 $as_echo_n "checking kernel file name for module symbols... " >&6; }
-	if test -f "$modpost"; then
+	if test "x$enable_linux_builtin" != xyes -a -f "$modpost"; then
 
 		if grep -q Modules.symvers $modpost; then
 
@@ -19113,6 +19211,74 @@ $as_echo "$SPL_SYMBOLS" >&6; }
 
 
 
+	{ $as_echo "$as_me:$LINENO: checking whether modules can be built" >&5
+$as_echo_n "checking whether modules can be built... " >&6; }
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build
+	echo "obj-m := conftest.o" >build/Makefile
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+		if test "x$enable_linux_builtin" != xyes; then
+			{ { $as_echo "$as_me:$LINENO: error: *** Unable to build an empty module." >&5
+$as_echo "$as_me: error: *** Unable to build an empty module." >&2;}
+   { (exit 1); exit 1; }; }
+		else
+			{ { $as_echo "$as_me:$LINENO: error:
+	*** Unable to build an empty module.
+	*** Please run 'make scripts' inside the kernel source tree." >&5
+$as_echo "$as_me: error:
+	*** Unable to build an empty module.
+	*** Please run 'make scripts' inside the kernel source tree." >&2;}
+   { (exit 1); exit 1; }; }
+		fi
+
+
+
+fi
+
+	rm -Rf build
+
+
+
 
 
 	if test "$ZFS_META_LICENSE" = GPL; then
@@ -25484,8 +25650,7 @@ $as_echo "$as_me: error: Bad value \"$ZFS_CONFIG\" for --with-config,
    { (exit 1); exit 1; }; } ;;
 	esac
 
-	 if test "$ZFS_CONFIG" = user ||
-	               test "$ZFS_CONFIG" = all; then
+	 if test "$ZFS_CONFIG" = user -o "$ZFS_CONFIG" = all; then
   CONFIG_USER_TRUE=
   CONFIG_USER_FALSE='#'
 else
@@ -25493,8 +25658,8 @@ else
   CONFIG_USER_FALSE=
 fi
 
-	 if test "$ZFS_CONFIG" = kernel ||
-	               test "$ZFS_CONFIG" = all; then
+	 if test "$ZFS_CONFIG" = kernel -o "$ZFS_CONFIG" = all &&
+		       test "x$enable_linux_builtin" != xyes ; then
   CONFIG_KERNEL_TRUE=
   CONFIG_KERNEL_FALSE='#'
 else

From fc88a6dda92a4fc00491a8afa24d144cc94063e4 Mon Sep 17 00:00:00 2001
From: Etienne Dechamps <etienne.dechamps@ovh.net>
Date: Mon, 16 Jul 2012 09:37:38 +0200
Subject: [PATCH 3/6] Fake modpost stage for LINUX_COMPILE.

Currently, when building a test case, we're compiling an entire Linux
module from beginning to end. This includes the MODPOST stage, which
generates a "conftest.mod.c" file with some boilerplate module
declaration code.

This poses a problem when configuring for built-in on kernels which have
loadable module support disabled. In this case conftest.mod.c is
referencing disabled code, resulting in a compilation failure, thus
breaking the tests.

This patch fixes the issue by faking the modpost stage when the
--enable-linux-builtin option is provided.  It does so by forcing the
modpost command to be /bin/true, and using an empty conftest.mod.c file.
The test module still compiles fine, although the result isn't loadable,
but we don't really care at this point.

Note it is important to preserve the modpost stage when building out of
tree.  The ZFS_AC_KERNEL_BLK_END_REQUEST, ZFS_AC_KERNEL_BLK_QUEUE_FLUSH,
and ZFS_AC_KERNEL_BLK_RQ_BYTES configure checks all depend on it to
identify GPL-only symbols.

Signed-off-by: Prakash Surya <surya1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #851
---
 config/kernel.m4 |   6 +-
 configure        | 744 +++++++++++++++++++++++++++++++----------------
 2 files changed, 500 insertions(+), 250 deletions(-)

diff --git a/config/kernel.m4 b/config/kernel.m4
index 2fb3fc91b6c5..b9c9fb982779 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -444,10 +444,12 @@ dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
 dnl #
 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
 	m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
 	AS_IF(
-		[AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
+		[AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
 		[$4],
 		[_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
 	)
diff --git a/configure b/configure
index f3a9288b5d6b..5a52d9443a02 100755
--- a/configure
+++ b/configure
@@ -12437,9 +12437,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -12526,9 +12528,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -12598,9 +12602,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -12650,9 +12656,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -12759,9 +12767,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -12824,9 +12834,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -12890,9 +12902,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -12956,9 +12970,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13128,9 +13144,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13196,9 +13214,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13264,9 +13284,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13330,9 +13352,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13398,9 +13422,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13464,9 +13490,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13534,9 +13562,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13601,9 +13631,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13667,9 +13699,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13733,9 +13767,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13801,9 +13837,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13869,9 +13907,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -13938,9 +13978,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14006,9 +14048,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14075,9 +14119,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14144,9 +14190,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14214,9 +14262,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14284,9 +14334,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14353,9 +14405,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14422,9 +14476,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14491,9 +14547,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14561,9 +14619,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14630,9 +14690,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14698,9 +14760,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14767,9 +14831,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14836,9 +14902,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -14905,9 +14973,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15027,9 +15097,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15098,9 +15170,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15176,9 +15250,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15245,9 +15321,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15315,9 +15393,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15385,9 +15465,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15454,9 +15536,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15518,9 +15602,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15582,9 +15668,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15646,9 +15734,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15710,9 +15800,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15774,9 +15866,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15841,9 +15935,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15910,9 +16006,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -15979,9 +16077,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -16048,9 +16148,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -16116,9 +16218,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -16184,9 +16288,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -16254,9 +16360,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -16323,9 +16431,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -16391,9 +16501,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -16460,9 +16572,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -16852,9 +16966,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -16925,9 +17041,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -17050,9 +17168,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -17117,9 +17237,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -17237,9 +17359,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19234,9 +19358,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19323,9 +19449,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19395,9 +19523,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19447,9 +19577,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19556,9 +19688,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19621,9 +19755,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19687,9 +19823,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19753,9 +19891,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19925,9 +20065,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19993,9 +20135,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20061,9 +20205,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20127,9 +20273,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20195,9 +20343,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20261,9 +20411,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20331,9 +20483,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20398,9 +20552,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20464,9 +20620,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20530,9 +20688,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20598,9 +20758,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20666,9 +20828,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20735,9 +20899,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20803,9 +20969,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20872,9 +21040,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20941,9 +21111,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21011,9 +21183,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21081,9 +21255,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21150,9 +21326,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21219,9 +21397,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21288,9 +21468,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21358,9 +21540,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21427,9 +21611,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21495,9 +21681,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21564,9 +21752,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21633,9 +21823,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21702,9 +21894,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21824,9 +22018,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21895,9 +22091,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -21973,9 +22171,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22042,9 +22242,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22112,9 +22314,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22182,9 +22386,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22251,9 +22457,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22315,9 +22523,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22379,9 +22589,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22443,9 +22655,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22507,9 +22721,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22571,9 +22787,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22638,9 +22856,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22707,9 +22927,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22776,9 +22998,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22845,9 +23069,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22913,9 +23139,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -22981,9 +23209,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -23051,9 +23281,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -23120,9 +23352,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -23188,9 +23422,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -23257,9 +23493,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -23649,9 +23887,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -23722,9 +23962,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -23847,9 +24089,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -23914,9 +24158,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -24034,9 +24280,11 @@ main (void)
 _ACEOF
 
 
-	rm -Rf build && mkdir -p build
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
 	echo "obj-m := conftest.o" >build/Makefile
-	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?

From 705741827ab55e7d92c3eb74f332a5ddd24971b5 Mon Sep 17 00:00:00 2001
From: Etienne Dechamps <etienne.dechamps@ovh.net>
Date: Wed, 25 Jul 2012 14:38:58 -0700
Subject: [PATCH 4/6] When checking for symbol exports, try compiling.

This patch adds a new autoconf function: ZFS_LINUX_TRY_COMPILE_SYMBOL.
This new function does the following:

 - Call LINUX_TRY_COMPILE with the specified parameters.
 - If unsuccessful, return false.
 - If successful and we're configuring with --enable-linux-builtin,
   return true.
 - Else, call CHECK_SYMBOL_EXPORT with the specified parameters and
   return the result.

All calls to CHECK_SYMBOL_EXPORT are converted to
LINUX_TRY_COMPILE_SYMBOL so that the tests work even when configuring
for builtin on a kernel which doesn't have loadable module support, or
hasn't been built yet.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #851
---
 config/kernel-bdi-setup-and-register.m4 |   20 +-
 config/kernel-blkdev-get-by-path.m4     |   20 +-
 config/kernel-check-disk-size-change.m4 |   20 +-
 config/kernel-clear-inode.m4            |   19 +-
 config/kernel-d-make-root.m4            |   19 +-
 config/kernel-d-obtain-alias.m4         |   20 +-
 config/kernel-get-gendisk.m4            |   20 +-
 config/kernel-insert-inode-locked.m4    |   20 +-
 config/kernel-mount-nodev.m4            |   19 +-
 config/kernel-open-bdev-exclusive.m4    |   20 +-
 config/kernel-truncate-setsize.m4       |   20 +-
 config/kernel.m4                        |   48 +-
 configure                               | 2332 +++++++++++++++++------
 13 files changed, 1922 insertions(+), 675 deletions(-)

diff --git a/config/kernel-bdi-setup-and-register.m4 b/config/kernel-bdi-setup-and-register.m4
index 56fab8757374..4196091e91be 100644
--- a/config/kernel-bdi-setup-and-register.m4
+++ b/config/kernel-bdi-setup-and-register.m4
@@ -5,11 +5,17 @@ dnl # exported by the kernel.  This is a trivial helper function but
 dnl # using it significantly simplifies the code surrounding setting
 dnl # up and tearing down the bdi structure.
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[bdi_setup_and_register],
-		[mm/backing-dev.c],
-		[AC_DEFINE(HAVE_BDI_SETUP_AND_REGISTER, 1,
-		[bdi_setup_and_register() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER],
+	[AC_MSG_CHECKING([whether bdi_setup_and_register() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/backing-dev.h>
+	], [
+		bdi_setup_and_register(NULL, NULL, 0);
+	], [bdi_setup_and_register], [mm/backing-dev.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_BDI_SETUP_AND_REGISTER, 1,
+		          [bdi_setup_and_register() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel-blkdev-get-by-path.m4 b/config/kernel-blkdev-get-by-path.m4
index 0d5d2b120dec..40ecc06b6c92 100644
--- a/config/kernel-blkdev-get-by-path.m4
+++ b/config/kernel-blkdev-get-by-path.m4
@@ -3,11 +3,17 @@ dnl # 2.6.38 API change
 dnl # open_bdev_exclusive() changed to blkdev_get_by_path()
 dnl # close_bdev_exclusive() changed to blkdev_put()
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[blkdev_get_by_path],
-		[fs/block_dev.c],
-		[AC_DEFINE(HAVE_BLKDEV_GET_BY_PATH, 1,
-		[blkdev_get_by_path() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH],
+	[AC_MSG_CHECKING([whether blkdev_get_by_path() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/fs.h>
+	], [
+		blkdev_get_by_path(NULL, 0, NULL);
+	], [blkdev_get_by_path], [fs/block_dev.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_BLKDEV_GET_BY_PATH, 1,
+		          [blkdev_get_by_path() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel-check-disk-size-change.m4 b/config/kernel-check-disk-size-change.m4
index 1a730c0c5715..ea5c75f39f20 100644
--- a/config/kernel-check-disk-size-change.m4
+++ b/config/kernel-check-disk-size-change.m4
@@ -2,11 +2,17 @@ dnl #
 dnl # 2.6.28 API change
 dnl # Added check_disk_size_change() helper function.
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[check_disk_size_change],
-		[fs/block_dev.c],
-		[AC_DEFINE(HAVE_CHECK_DISK_SIZE_CHANGE, 1,
-		[check_disk_size_change() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE],
+	[AC_MSG_CHECKING([whether check_disk_size_change() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/fs.h>
+	], [
+		check_disk_size_change(NULL, NULL);
+	], [check_disk_size_change], [fs/block_dev.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_CHECK_DISK_SIZE_CHANGE, 1,
+		          [check_disk_size_change() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel-clear-inode.m4 b/config/kernel-clear-inode.m4
index e3eace2b26a7..8d880fcd8f50 100644
--- a/config/kernel-clear-inode.m4
+++ b/config/kernel-clear-inode.m4
@@ -19,11 +19,16 @@ dnl # Therefore, to ensure we have the correct API we only allow the
 dnl # clear_inode() compatibility code to be defined iff the evict_inode()
 dnl # functionality is also detected.
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_CLEAR_INODE], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[clear_inode],
-		[fs/inode.c],
-		[AC_DEFINE(HAVE_CLEAR_INODE, 1,
-		[clear_inode() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_CLEAR_INODE],
+	[AC_MSG_CHECKING([whether clear_inode() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/fs.h>
+	], [
+		clear_inode(NULL);
+	], [clear_inode], [fs/inode.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_CLEAR_INODE, 1, [clear_inode() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel-d-make-root.m4 b/config/kernel-d-make-root.m4
index fd2c52d74a40..9c2b73dcbf59 100644
--- a/config/kernel-d-make-root.m4
+++ b/config/kernel-d-make-root.m4
@@ -2,11 +2,16 @@ dnl #
 dnl # 3.4.0 API change
 dnl # Added d_make_root() to replace previous d_alloc_root() function.
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_D_MAKE_ROOT], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[d_make_root],
-		[fs/dcache.c],
-		[AC_DEFINE(HAVE_D_MAKE_ROOT, 1,
-		[d_make_root() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_D_MAKE_ROOT],
+	[AC_MSG_CHECKING([whether d_make_root() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/dcache.h>
+	], [
+		d_make_root(NULL);
+	], [d_make_root], [fs/dcache.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_D_MAKE_ROOT, 1, [d_make_root() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel-d-obtain-alias.m4 b/config/kernel-d-obtain-alias.m4
index d80a1c89c446..2b4b11eccc1b 100644
--- a/config/kernel-d-obtain-alias.m4
+++ b/config/kernel-d-obtain-alias.m4
@@ -2,11 +2,17 @@ dnl #
 dnl # 2.6.28 API change
 dnl # Added d_obtain_alias() helper function.
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_D_OBTAIN_ALIAS], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[d_obtain_alias],
-		[fs/dcache.c],
-		[AC_DEFINE(HAVE_D_OBTAIN_ALIAS, 1,
-		[d_obtain_alias() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_D_OBTAIN_ALIAS],
+	[AC_MSG_CHECKING([whether d_obtain_alias() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/dcache.h>
+	], [
+		d_obtain_alias(NULL);
+	], [d_obtain_alias], [fs/dcache.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_D_OBTAIN_ALIAS, 1,
+		          [d_obtain_alias() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel-get-gendisk.m4 b/config/kernel-get-gendisk.m4
index 8cd725f0e0b3..b0913770e43d 100644
--- a/config/kernel-get-gendisk.m4
+++ b/config/kernel-get-gendisk.m4
@@ -1,11 +1,17 @@
 dnl #
 dnl # 2.6.34 API change
-dnl # Verify the get_gendisk() symbol is exported.
+dnl # Verify the get_gendisk() symbol is available.
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_GET_GENDISK], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[get_gendisk],
-		[block/genhd.c],
-		[AC_DEFINE(HAVE_GET_GENDISK, 1, [get_gendisk() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_GET_GENDISK],
+	[AC_MSG_CHECKING([whether get_gendisk() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/genhd.h>
+	], [
+		get_gendisk(0, NULL);
+	], [get_gendisk], [block/genhd.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_GET_GENDISK, 1, [get_gendisk() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel-insert-inode-locked.m4 b/config/kernel-insert-inode-locked.m4
index 1faff7e642b3..da141d180a9e 100644
--- a/config/kernel-insert-inode-locked.m4
+++ b/config/kernel-insert-inode-locked.m4
@@ -2,11 +2,17 @@ dnl #
 dnl # 2.6.28 API change
 dnl # Added insert_inode_locked() helper function.
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_INSERT_INODE_LOCKED], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[insert_inode_locked],
-		[fs/inode.c],
-		[AC_DEFINE(HAVE_INSERT_INODE_LOCKED, 1,
-		[insert_inode_locked() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_INSERT_INODE_LOCKED],
+	[AC_MSG_CHECKING([whether insert_inode_locked() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/fs.h>
+	], [
+		insert_inode_locked(NULL);
+	], [insert_inode_locked], [fs/inode.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_INSERT_INODE_LOCKED, 1,
+		          [insert_inode_locked() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel-mount-nodev.m4 b/config/kernel-mount-nodev.m4
index 9229d5b1bb0d..28a45157e4d0 100644
--- a/config/kernel-mount-nodev.m4
+++ b/config/kernel-mount-nodev.m4
@@ -5,11 +5,16 @@ dnl # in the file_system_type structure.  When using the new
 dnl # interface the caller must now use the mount_nodev() helper.
 dnl # This updated callback and helper no longer pass the vfsmount.
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_MOUNT_NODEV], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[mount_nodev],
-		[fs/super.c],
-		[AC_DEFINE(HAVE_MOUNT_NODEV, 1,
-		[mount_nodev() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_MOUNT_NODEV],
+	[AC_MSG_CHECKING([whether mount_nodev() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/fs.h>
+	], [
+		mount_nodev(NULL, 0, NULL, NULL);
+	], [mount_nodev], [fs/super.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_MOUNT_NODEV, 1, [mount_nodev() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel-open-bdev-exclusive.m4 b/config/kernel-open-bdev-exclusive.m4
index 734b2134cc43..0661315a610f 100644
--- a/config/kernel-open-bdev-exclusive.m4
+++ b/config/kernel-open-bdev-exclusive.m4
@@ -2,11 +2,17 @@ dnl #
 dnl # 2.6.28 API change
 dnl # open/close_bdev_excl() renamed to open/close_bdev_exclusive()
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[open_bdev_exclusive],
-		[fs/block_dev.c],
-		[AC_DEFINE(HAVE_OPEN_BDEV_EXCLUSIVE, 1,
-		[open_bdev_exclusive() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE],
+	[AC_MSG_CHECKING([whether open_bdev_exclusive() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/fs.h>
+	], [
+		open_bdev_exclusive(NULL, 0, NULL);
+	], [open_bdev_exclusive], [fs/block_dev.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_OPEN_BDEV_EXCLUSIVE, 1,
+		          [open_bdev_exclusive() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel-truncate-setsize.m4 b/config/kernel-truncate-setsize.m4
index d8b2b47bd7de..7e4aff479a90 100644
--- a/config/kernel-truncate-setsize.m4
+++ b/config/kernel-truncate-setsize.m4
@@ -2,11 +2,17 @@ dnl #
 dnl # 2.6.35 API change
 dnl # Added truncate_setsize() helper function.
 dnl #
-AC_DEFUN([ZFS_AC_KERNEL_TRUNCATE_SETSIZE], [
-	ZFS_CHECK_SYMBOL_EXPORT(
-		[truncate_setsize],
-		[mm/truncate.c],
-		[AC_DEFINE(HAVE_TRUNCATE_SETSIZE, 1,
-		[truncate_setsize() is available])],
-		[])
+AC_DEFUN([ZFS_AC_KERNEL_TRUNCATE_SETSIZE],
+	[AC_MSG_CHECKING([whether truncate_setsize() is available])
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
+		#include <linux/mm.h>
+	], [
+		truncate_setsize(NULL, 0);
+	], [truncate_setsize], [mm/truncate.c], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_TRUNCATE_SETSIZE, 1,
+		          [truncate_setsize() is available])
+	], [
+		AC_MSG_RESULT(no)
+	])
 ])
diff --git a/config/kernel.m4 b/config/kernel.m4
index b9c9fb982779..a40bb5b6c1d3 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -159,7 +159,7 @@ AC_DEFUN([ZFS_AC_KERNEL], [
 		], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
 			kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
 		], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
-		        kernelbuild=${kernelsrc}-obj/${target_cpu}/default
+			kernelbuild=${kernelsrc}-obj/${target_cpu}/default
 		], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
 			kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
 		], [
@@ -491,30 +491,48 @@ dnl #
 dnl # ZFS_CHECK_SYMBOL_EXPORT
 dnl # check symbol exported or not
 dnl #
-AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT],
-	[AC_MSG_CHECKING([whether symbol $1 is exported])
+AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
 	grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
-	AS_IF([test $rc -ne 0], [
+	if test $rc -ne 0; then
 		export=0
 		for file in $2; do
-			grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*($1)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
-			AS_IF([test $rc -eq 0], [
+			if test $rc -eq 0; then
 				export=1
 				break;
-			])
+			fi
 		done
-		AS_IF([test $export -eq 0], [
-			AC_MSG_RESULT([no])
+		if test $export -eq 0; then :
 			$4
-		], [
-			AC_MSG_RESULT([yes])
+		else :
 			$3
-		])
-	], [
-		AC_MSG_RESULT([yes])
+		fi
+	else :
 		$3
-	])
+	fi
+])
+
+dnl #
+dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
+dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
+dnl # is called if not compiling for builtin
+dnl #
+AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
+	ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
+	if test $rc -ne 0; then :
+		$6
+	else
+		if test "x$enable_linux_builtin" != xyes; then
+			ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
+		fi
+		if test $rc -ne 0; then :
+			$6
+		else :
+			$5
+		fi
+	fi
 ])
diff --git a/configure b/configure
index 5a52d9443a02..9b97fb427afa 100755
--- a/configure
+++ b/configure
@@ -12133,7 +12133,7 @@ elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
 
 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
 
-		        kernelbuild=${kernelsrc}-obj/${target_cpu}/default
+			kernelbuild=${kernelsrc}-obj/${target_cpu}/default
 
 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
 
@@ -13009,35 +13009,101 @@ fi
 
 
 
+	{ $as_echo "$as_me:$LINENO: checking whether blkdev_get_by_path() is available" >&5
+$as_echo_n "checking whether blkdev_get_by_path() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/fs.h>
+
+int
+main (void)
+{
+
+		blkdev_get_by_path(NULL, 0, NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+	rm -Rf build
+
+
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol blkdev_get_by_path is exported" >&5
-$as_echo_n "checking whether symbol blkdev_get_by_path is exported... " >&6; }
 	grep -q -E '[[:space:]]blkdev_get_by_path[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in fs/block_dev.c; do
-			grep -q -E "EXPORT_SYMBOL.*(blkdev_get_by_path)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(blkdev_get_by_path)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -13045,63 +13111,103 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+		fi
+	fi
 
 
-else
+	{ $as_echo "$as_me:$LINENO: checking whether open_bdev_exclusive() is available" >&5
+$as_echo_n "checking whether open_bdev_exclusive() is available... " >&6; }
 
-		{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BLKDEV_GET_BY_PATH 1
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/fs.h>
+
+int
+main (void)
+{
+
+		open_bdev_exclusive(NULL, 0, NULL);
+
+  ;
+  return 0;
+}
+
 _ACEOF
 
 
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
+
+
+	if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol open_bdev_exclusive is exported" >&5
-$as_echo_n "checking whether symbol open_bdev_exclusive is exported... " >&6; }
 	grep -q -E '[[:space:]]open_bdev_exclusive[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in fs/block_dev.c; do
-			grep -q -E "EXPORT_SYMBOL.*(open_bdev_exclusive)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(open_bdev_exclusive)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
-
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_OPEN_BDEV_EXCLUSIVE 1
-_ACEOF
-
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-fi
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -13111,8 +13217,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+		fi
+	fi
 
 
 
@@ -15013,46 +15119,99 @@ fi
 
 	EXTRA_KCFLAGS="$tmp_flags"
 
+	{ $as_echo "$as_me:$LINENO: checking whether get_gendisk() is available" >&5
+$as_echo_n "checking whether get_gendisk() is available... " >&6; }
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol get_gendisk is exported" >&5
-$as_echo_n "checking whether symbol get_gendisk is exported... " >&6; }
-	grep -q -E '[[:space:]]get_gendisk[[:space:]]' \
-		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-	rc=$?
-	if test $rc -ne 0; then
-
-		export=0
-		for file in block/genhd.c; do
-			grep -q -E "EXPORT_SYMBOL.*(get_gendisk)" "$LINUX/$file" 2>/dev/null
-			rc=$?
-			if test $rc -eq 0; then
 
-				export=1
-				break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-		done
-		if test $export -eq 0; then
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		#include <linux/genhd.h>
 
+int
+main (void)
+{
 
-else
+		get_gendisk(0, NULL);
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_GET_GENDISK 1
 _ACEOF
 
 
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
 
-else
+
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
+
+	grep -q -E '[[:space:]]get_gendisk[[:space:]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in block/genhd.c; do
+			grep -q -E "EXPORT_SYMBOL.*(get_gendisk)" \
+				"$LINUX/$file" 2>/dev/null
+			rc=$?
+			if test $rc -eq 0; then
+				export=1
+				break;
+			fi
+		done
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
+
+		fi
+		if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -15062,8 +15221,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+		fi
+	fi
 
 
 
@@ -16611,46 +16770,99 @@ fi
 
 
 
+	{ $as_echo "$as_me:$LINENO: checking whether clear_inode() is available" >&5
+$as_echo_n "checking whether clear_inode() is available... " >&6; }
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol clear_inode is exported" >&5
-$as_echo_n "checking whether symbol clear_inode is exported... " >&6; }
-	grep -q -E '[[:space:]]clear_inode[[:space:]]' \
-		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-	rc=$?
-	if test $rc -ne 0; then
-
-		export=0
-		for file in fs/inode.c; do
-			grep -q -E "EXPORT_SYMBOL.*(clear_inode)" "$LINUX/$file" 2>/dev/null
-			rc=$?
-			if test $rc -eq 0; then
-
-				export=1
-				break;
-
-fi
 
-		done
-		if test $export -eq 0; then
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
 
-else
+		#include <linux/fs.h>
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+int
+main (void)
+{
+
+		clear_inode(NULL);
+
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CLEAR_INODE 1
 _ACEOF
 
 
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
 
-else
+
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
+
+	grep -q -E '[[:space:]]clear_inode[[:space:]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in fs/inode.c; do
+			grep -q -E "EXPORT_SYMBOL.*(clear_inode)" \
+				"$LINUX/$file" 2>/dev/null
+			rc=$?
+			if test $rc -eq 0; then
+				export=1
+				break;
+			fi
+		done
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
+
+		fi
+		if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -16660,39 +16872,105 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
+		fi
+	fi
+
+
+	{ $as_echo "$as_me:$LINENO: checking whether insert_inode_locked() is available" >&5
+$as_echo_n "checking whether insert_inode_locked() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/fs.h>
+
+int
+main (void)
+{
+
+		insert_inode_locked(NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
 
 
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol insert_inode_locked is exported" >&5
-$as_echo_n "checking whether symbol insert_inode_locked is exported... " >&6; }
 	grep -q -E '[[:space:]]insert_inode_locked[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in fs/inode.c; do
-			grep -q -E "EXPORT_SYMBOL.*(insert_inode_locked)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(insert_inode_locked)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -16700,52 +16978,105 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+		fi
+	fi
 
 
-else
+	{ $as_echo "$as_me:$LINENO: checking whether d_make_root() is available" >&5
+$as_echo_n "checking whether d_make_root() is available... " >&6; }
 
-		{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_INSERT_INODE_LOCKED 1
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/dcache.h>
+
+int
+main (void)
+{
+
+		d_make_root(NULL);
+
+  ;
+  return 0;
+}
+
 _ACEOF
 
 
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
+
+
+	if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol d_make_root is exported" >&5
-$as_echo_n "checking whether symbol d_make_root is exported... " >&6; }
 	grep -q -E '[[:space:]]d_make_root[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in fs/dcache.c; do
-			grep -q -E "EXPORT_SYMBOL.*(d_make_root)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(d_make_root)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -16753,52 +17084,105 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+		fi
+	fi
 
 
-else
+	{ $as_echo "$as_me:$LINENO: checking whether d_obtain_alias() is available" >&5
+$as_echo_n "checking whether d_obtain_alias() is available... " >&6; }
 
-		{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_MAKE_ROOT 1
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
 _ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/dcache.h>
+
+int
+main (void)
+{
+
+		d_obtain_alias(NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
 
 
 fi
 
+	rm -Rf build
+
 
+	if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol d_obtain_alias is exported" >&5
-$as_echo_n "checking whether symbol d_obtain_alias is exported... " >&6; }
 	grep -q -E '[[:space:]]d_obtain_alias[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in fs/dcache.c; do
-			grep -q -E "EXPORT_SYMBOL.*(d_obtain_alias)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(d_obtain_alias)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -16806,52 +17190,105 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+		fi
+	fi
+
+
+	{ $as_echo "$as_me:$LINENO: checking whether check_disk_size_change() is available" >&5
+$as_echo_n "checking whether check_disk_size_change() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/fs.h>
+
+int
+main (void)
+{
+
+		check_disk_size_change(NULL, NULL);
 
+  ;
+  return 0;
+}
+
+_ACEOF
 
+
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
 else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
 
-		{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_OBTAIN_ALIAS 1
-_ACEOF
+fi
 
+	rm -Rf build
 
-fi
 
+	if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol check_disk_size_change is exported" >&5
-$as_echo_n "checking whether symbol check_disk_size_change is exported... " >&6; }
 	grep -q -E '[[:space:]]check_disk_size_change[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in fs/block_dev.c; do
-			grep -q -E "EXPORT_SYMBOL.*(check_disk_size_change)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(check_disk_size_change)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -16859,63 +17296,103 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+		fi
+	fi
 
 
-else
+	{ $as_echo "$as_me:$LINENO: checking whether truncate_setsize() is available" >&5
+$as_echo_n "checking whether truncate_setsize() is available... " >&6; }
 
-		{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CHECK_DISK_SIZE_CHANGE 1
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/mm.h>
+
+int
+main (void)
+{
+
+		truncate_setsize(NULL, 0);
+
+  ;
+  return 0;
+}
+
 _ACEOF
 
 
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
+
+
+	if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol truncate_setsize is exported" >&5
-$as_echo_n "checking whether symbol truncate_setsize is exported... " >&6; }
 	grep -q -E '[[:space:]]truncate_setsize[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in mm/truncate.c; do
-			grep -q -E "EXPORT_SYMBOL.*(truncate_setsize)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(truncate_setsize)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
-
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_TRUNCATE_SETSIZE 1
-_ACEOF
-
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-fi
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -16925,8 +17402,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+		fi
+	fi
 
 
 
@@ -17081,46 +17558,99 @@ fi
 
 	EXTRA_KCFLAGS="$tmp_flags"
 
+	{ $as_echo "$as_me:$LINENO: checking whether mount_nodev() is available" >&5
+$as_echo_n "checking whether mount_nodev() is available... " >&6; }
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol mount_nodev is exported" >&5
-$as_echo_n "checking whether symbol mount_nodev is exported... " >&6; }
-	grep -q -E '[[:space:]]mount_nodev[[:space:]]' \
-		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-	rc=$?
-	if test $rc -ne 0; then
-
-		export=0
-		for file in fs/super.c; do
-			grep -q -E "EXPORT_SYMBOL.*(mount_nodev)" "$LINUX/$file" 2>/dev/null
-			rc=$?
-			if test $rc -eq 0; then
 
-				export=1
-				break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-		done
-		if test $export -eq 0; then
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		#include <linux/fs.h>
 
+int
+main (void)
+{
 
-else
+		mount_nodev(NULL, 0, NULL, NULL);
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_MOUNT_NODEV 1
 _ACEOF
 
 
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
+
 
-else
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
+
+	grep -q -E '[[:space:]]mount_nodev[[:space:]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in fs/super.c; do
+			grep -q -E "EXPORT_SYMBOL.*(mount_nodev)" \
+				"$LINUX/$file" 2>/dev/null
+			rc=$?
+			if test $rc -eq 0; then
+				export=1
+				break;
+			fi
+		done
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
+
+		fi
+		if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -17130,8 +17660,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+		fi
+	fi
 
 
 
@@ -17276,46 +17806,99 @@ fi
 
 
 
+	{ $as_echo "$as_me:$LINENO: checking whether bdi_setup_and_register() is available" >&5
+$as_echo_n "checking whether bdi_setup_and_register() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/backing-dev.h>
+
+int
+main (void)
+{
+
+		bdi_setup_and_register(NULL, NULL, 0);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+	rm -Rf build
+
+
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol bdi_setup_and_register is exported" >&5
-$as_echo_n "checking whether symbol bdi_setup_and_register is exported... " >&6; }
 	grep -q -E '[[:space:]]bdi_setup_and_register[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in mm/backing-dev.c; do
-			grep -q -E "EXPORT_SYMBOL.*(bdi_setup_and_register)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(bdi_setup_and_register)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
-
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BDI_SETUP_AND_REGISTER 1
-_ACEOF
-
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-fi
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -17325,8 +17908,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+		fi
+	fi
 
 
 
@@ -19054,7 +19637,7 @@ elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
 
 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
 
-		        kernelbuild=${kernelsrc}-obj/${target_cpu}/default
+			kernelbuild=${kernelsrc}-obj/${target_cpu}/default
 
 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
 
@@ -19930,35 +20513,101 @@ fi
 
 
 
+	{ $as_echo "$as_me:$LINENO: checking whether blkdev_get_by_path() is available" >&5
+$as_echo_n "checking whether blkdev_get_by_path() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/fs.h>
+
+int
+main (void)
+{
+
+		blkdev_get_by_path(NULL, 0, NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+	rm -Rf build
+
+
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol blkdev_get_by_path is exported" >&5
-$as_echo_n "checking whether symbol blkdev_get_by_path is exported... " >&6; }
 	grep -q -E '[[:space:]]blkdev_get_by_path[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in fs/block_dev.c; do
-			grep -q -E "EXPORT_SYMBOL.*(blkdev_get_by_path)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(blkdev_get_by_path)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -19966,63 +20615,103 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+		fi
+	fi
 
 
-else
+	{ $as_echo "$as_me:$LINENO: checking whether open_bdev_exclusive() is available" >&5
+$as_echo_n "checking whether open_bdev_exclusive() is available... " >&6; }
 
-		{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BLKDEV_GET_BY_PATH 1
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/fs.h>
+
+int
+main (void)
+{
+
+		open_bdev_exclusive(NULL, 0, NULL);
+
+  ;
+  return 0;
+}
+
 _ACEOF
 
 
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
+
 
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol open_bdev_exclusive is exported" >&5
-$as_echo_n "checking whether symbol open_bdev_exclusive is exported... " >&6; }
 	grep -q -E '[[:space:]]open_bdev_exclusive[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in fs/block_dev.c; do
-			grep -q -E "EXPORT_SYMBOL.*(open_bdev_exclusive)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(open_bdev_exclusive)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
-
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_OPEN_BDEV_EXCLUSIVE 1
-_ACEOF
-
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-fi
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -20032,8 +20721,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+		fi
+	fi
 
 
 
@@ -21934,46 +22623,99 @@ fi
 
 	EXTRA_KCFLAGS="$tmp_flags"
 
+	{ $as_echo "$as_me:$LINENO: checking whether get_gendisk() is available" >&5
+$as_echo_n "checking whether get_gendisk() is available... " >&6; }
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol get_gendisk is exported" >&5
-$as_echo_n "checking whether symbol get_gendisk is exported... " >&6; }
-	grep -q -E '[[:space:]]get_gendisk[[:space:]]' \
-		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-	rc=$?
-	if test $rc -ne 0; then
 
-		export=0
-		for file in block/genhd.c; do
-			grep -q -E "EXPORT_SYMBOL.*(get_gendisk)" "$LINUX/$file" 2>/dev/null
-			rc=$?
-			if test $rc -eq 0; then
 
-				export=1
-				break;
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-fi
 
-		done
-		if test $export -eq 0; then
+		#include <linux/genhd.h>
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+int
+main (void)
+{
 
+		get_gendisk(0, NULL);
 
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
 else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_GET_GENDISK 1
-_ACEOF
+fi
+
+	rm -Rf build
 
 
-fi
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
+
+	grep -q -E '[[:space:]]get_gendisk[[:space:]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in block/genhd.c; do
+			grep -q -E "EXPORT_SYMBOL.*(get_gendisk)" \
+				"$LINUX/$file" 2>/dev/null
+			rc=$?
+			if test $rc -eq 0; then
+				export=1
+				break;
+			fi
+		done
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
+
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -21983,8 +22725,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+		fi
+	fi
 
 
 
@@ -23455,15 +24197,298 @@ $as_echo "no" >&6; }
 
 
 
-fi
+fi
+
+	rm -Rf build
+
+
+
+
+	{ $as_echo "$as_me:$LINENO: checking whether eops->encode_fh() wants inode" >&5
+$as_echo_n "checking whether eops->encode_fh() wants inode... " >&6; }
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/exportfs.h>
+		int encode_fh(struct inode *inode, __u32 *fh, int *max_len,
+		              struct inode *parent) { return 0; }
+		static struct export_operations eops __attribute__ ((unused))={
+			.encode_fh = encode_fh,
+		};
+
+int
+main (void)
+{
+
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_ENCODE_FH_WITH_INODE 1
+_ACEOF
+
+
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+
+
+fi
+
+	rm -Rf build
+
+
+
+	{ $as_echo "$as_me:$LINENO: checking whether clear_inode() is available" >&5
+$as_echo_n "checking whether clear_inode() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/fs.h>
+
+int
+main (void)
+{
+
+		clear_inode(NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+	rm -Rf build
+
+
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
+
+	grep -q -E '[[:space:]]clear_inode[[:space:]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in fs/inode.c; do
+			grep -q -E "EXPORT_SYMBOL.*(clear_inode)" \
+				"$LINUX/$file" 2>/dev/null
+			rc=$?
+			if test $rc -eq 0; then
+				export=1
+				break;
+			fi
+		done
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
+
+		fi
+		if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+		else :
+
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_CLEAR_INODE 1
+_ACEOF
+
+
+		fi
+	fi
+
+
+	{ $as_echo "$as_me:$LINENO: checking whether insert_inode_locked() is available" >&5
+$as_echo_n "checking whether insert_inode_locked() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+		#include <linux/fs.h>
+
+int
+main (void)
+{
+
+		insert_inode_locked(NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+	rm -Rf build
+
+
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
+
+	grep -q -E '[[:space:]]insert_inode_locked[[:space:]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in fs/inode.c; do
+			grep -q -E "EXPORT_SYMBOL.*(insert_inode_locked)" \
+				"$LINUX/$file" 2>/dev/null
+			rc=$?
+			if test $rc -eq 0; then
+				export=1
+				break;
+			fi
+		done
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
+
+		fi
+		if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+		else :
+
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_INSERT_INODE_LOCKED 1
+_ACEOF
 
-	rm -Rf build
 
+		fi
+	fi
 
 
+	{ $as_echo "$as_me:$LINENO: checking whether d_make_root() is available" >&5
+$as_echo_n "checking whether d_make_root() is available... " >&6; }
 
-	{ $as_echo "$as_me:$LINENO: checking whether eops->encode_fh() wants inode" >&5
-$as_echo_n "checking whether eops->encode_fh() wants inode... " >&6; }
 
 
 cat confdefs.h - <<_ACEOF >conftest.c
@@ -23474,17 +24499,13 @@ cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 
 
-		#include <linux/exportfs.h>
-		int encode_fh(struct inode *inode, __u32 *fh, int *max_len,
-		              struct inode *parent) { return 0; }
-		static struct export_operations eops __attribute__ ((unused))={
-			.encode_fh = encode_fh,
-		};
+		#include <linux/dcache.h>
 
 int
 main (void)
 {
 
+		d_make_root(NULL);
 
   ;
   return 0;
@@ -23508,22 +24529,11 @@ _ACEOF
   ac_status=$?
   $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
-
-		{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_ENCODE_FH_WITH_INODE 1
-_ACEOF
-
-
+  rc=0
 else
   $as_echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
-
-		{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
+ rc=1
 
 
 fi
@@ -23531,312 +24541,362 @@ fi
 	rm -Rf build
 
 
+	if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol clear_inode is exported" >&5
-$as_echo_n "checking whether symbol clear_inode is exported... " >&6; }
-	grep -q -E '[[:space:]]clear_inode[[:space:]]' \
+	else
+		if test "x$enable_linux_builtin" != xyes; then
+
+	grep -q -E '[[:space:]]d_make_root[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
-		for file in fs/inode.c; do
-			grep -q -E "EXPORT_SYMBOL.*(clear_inode)" "$LINUX/$file" 2>/dev/null
+		for file in fs/dcache.c; do
+			grep -q -E "EXPORT_SYMBOL.*(d_make_root)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
-
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CLEAR_INODE 1
-_ACEOF
-
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-fi
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_CLEAR_INODE 1
+#define HAVE_D_MAKE_ROOT 1
 _ACEOF
 
 
-fi
-
-
+		fi
+	fi
 
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol insert_inode_locked is exported" >&5
-$as_echo_n "checking whether symbol insert_inode_locked is exported... " >&6; }
-	grep -q -E '[[:space:]]insert_inode_locked[[:space:]]' \
-		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-	rc=$?
-	if test $rc -ne 0; then
+	{ $as_echo "$as_me:$LINENO: checking whether d_obtain_alias() is available" >&5
+$as_echo_n "checking whether d_obtain_alias() is available... " >&6; }
 
-		export=0
-		for file in fs/inode.c; do
-			grep -q -E "EXPORT_SYMBOL.*(insert_inode_locked)" "$LINUX/$file" 2>/dev/null
-			rc=$?
-			if test $rc -eq 0; then
 
-				export=1
-				break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-		done
-		if test $export -eq 0; then
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		#include <linux/dcache.h>
 
+int
+main (void)
+{
 
-else
+		d_obtain_alias(NULL);
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_INSERT_INODE_LOCKED 1
 _ACEOF
 
 
-fi
-
-
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
 else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
 
-		{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_INSERT_INODE_LOCKED 1
-_ACEOF
+fi
 
+	rm -Rf build
 
-fi
 
+	if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol d_make_root is exported" >&5
-$as_echo_n "checking whether symbol d_make_root is exported... " >&6; }
-	grep -q -E '[[:space:]]d_make_root[[:space:]]' \
+	grep -q -E '[[:space:]]d_obtain_alias[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in fs/dcache.c; do
-			grep -q -E "EXPORT_SYMBOL.*(d_make_root)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(d_obtain_alias)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
-
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_MAKE_ROOT 1
-_ACEOF
-
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-fi
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_MAKE_ROOT 1
+#define HAVE_D_OBTAIN_ALIAS 1
 _ACEOF
 
 
-fi
-
-
+		fi
+	fi
 
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol d_obtain_alias is exported" >&5
-$as_echo_n "checking whether symbol d_obtain_alias is exported... " >&6; }
-	grep -q -E '[[:space:]]d_obtain_alias[[:space:]]' \
-		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-	rc=$?
-	if test $rc -ne 0; then
+	{ $as_echo "$as_me:$LINENO: checking whether check_disk_size_change() is available" >&5
+$as_echo_n "checking whether check_disk_size_change() is available... " >&6; }
 
-		export=0
-		for file in fs/dcache.c; do
-			grep -q -E "EXPORT_SYMBOL.*(d_obtain_alias)" "$LINUX/$file" 2>/dev/null
-			rc=$?
-			if test $rc -eq 0; then
 
-				export=1
-				break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-		done
-		if test $export -eq 0; then
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		#include <linux/fs.h>
 
+int
+main (void)
+{
 
-else
+		check_disk_size_change(NULL, NULL);
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_OBTAIN_ALIAS 1
 _ACEOF
 
 
-fi
-
-
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
 else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
 
-		{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_OBTAIN_ALIAS 1
-_ACEOF
+fi
 
+	rm -Rf build
 
-fi
 
+	if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol check_disk_size_change is exported" >&5
-$as_echo_n "checking whether symbol check_disk_size_change is exported... " >&6; }
 	grep -q -E '[[:space:]]check_disk_size_change[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in fs/block_dev.c; do
-			grep -q -E "EXPORT_SYMBOL.*(check_disk_size_change)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(check_disk_size_change)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
+			fi
+		done
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
+
+		fi
+		if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+		else :
+
+		{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_CHECK_DISK_SIZE_CHANGE 1
+_ACEOF
 
-fi
 
-		done
-		if test $export -eq 0; then
+		fi
+	fi
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
 
+	{ $as_echo "$as_me:$LINENO: checking whether truncate_setsize() is available" >&5
+$as_echo_n "checking whether truncate_setsize() is available... " >&6; }
 
-else
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CHECK_DISK_SIZE_CHANGE 1
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
 _ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
 
-fi
+		#include <linux/mm.h>
 
+int
+main (void)
+{
 
-else
+		truncate_setsize(NULL, 0);
 
-		{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CHECK_DISK_SIZE_CHANGE 1
 _ACEOF
 
 
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
+
 
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+	else
+		if test "x$enable_linux_builtin" != xyes; then
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol truncate_setsize is exported" >&5
-$as_echo_n "checking whether symbol truncate_setsize is exported... " >&6; }
 	grep -q -E '[[:space:]]truncate_setsize[[:space:]]' \
 		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
-
 		export=0
 		for file in mm/truncate.c; do
-			grep -q -E "EXPORT_SYMBOL.*(truncate_setsize)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(truncate_setsize)" \
+				"$LINUX/$file" 2>/dev/null
 			rc=$?
 			if test $rc -eq 0; then
-
 				export=1
 				break;
-
-fi
-
+			fi
 		done
-		if test $export -eq 0; then
-
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_TRUNCATE_SETSIZE 1
-_ACEOF
-
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
 
-fi
+		fi
+		if test $rc -ne 0; then :
 
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -23846,8 +24906,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+		fi
+	fi
 
 
 
@@ -24002,46 +25062,99 @@ fi
 
 	EXTRA_KCFLAGS="$tmp_flags"
 
+	{ $as_echo "$as_me:$LINENO: checking whether mount_nodev() is available" >&5
+$as_echo_n "checking whether mount_nodev() is available... " >&6; }
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol mount_nodev is exported" >&5
-$as_echo_n "checking whether symbol mount_nodev is exported... " >&6; }
-	grep -q -E '[[:space:]]mount_nodev[[:space:]]' \
-		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-	rc=$?
-	if test $rc -ne 0; then
-
-		export=0
-		for file in fs/super.c; do
-			grep -q -E "EXPORT_SYMBOL.*(mount_nodev)" "$LINUX/$file" 2>/dev/null
-			rc=$?
-			if test $rc -eq 0; then
 
-				export=1
-				break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-		done
-		if test $export -eq 0; then
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		#include <linux/fs.h>
 
+int
+main (void)
+{
 
-else
+		mount_nodev(NULL, 0, NULL, NULL);
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_MOUNT_NODEV 1
 _ACEOF
 
 
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
 
-else
+
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
+
+	grep -q -E '[[:space:]]mount_nodev[[:space:]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in fs/super.c; do
+			grep -q -E "EXPORT_SYMBOL.*(mount_nodev)" \
+				"$LINUX/$file" 2>/dev/null
+			rc=$?
+			if test $rc -eq 0; then
+				export=1
+				break;
+			fi
+		done
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
+
+		fi
+		if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -24051,8 +25164,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+		fi
+	fi
 
 
 
@@ -24197,46 +25310,99 @@ fi
 
 
 
+	{ $as_echo "$as_me:$LINENO: checking whether bdi_setup_and_register() is available" >&5
+$as_echo_n "checking whether bdi_setup_and_register() is available... " >&6; }
 
-	{ $as_echo "$as_me:$LINENO: checking whether symbol bdi_setup_and_register is exported" >&5
-$as_echo_n "checking whether symbol bdi_setup_and_register is exported... " >&6; }
-	grep -q -E '[[:space:]]bdi_setup_and_register[[:space:]]' \
-		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-	rc=$?
-	if test $rc -ne 0; then
-
-		export=0
-		for file in mm/backing-dev.c; do
-			grep -q -E "EXPORT_SYMBOL.*(bdi_setup_and_register)" "$LINUX/$file" 2>/dev/null
-			rc=$?
-			if test $rc -eq 0; then
 
-				export=1
-				break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-		done
-		if test $export -eq 0; then
 
-			{ $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+		#include <linux/backing-dev.h>
 
+int
+main (void)
+{
 
-else
+		bdi_setup_and_register(NULL, NULL, 0);
 
-			{ $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BDI_SETUP_AND_REGISTER 1
 _ACEOF
 
 
+	rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+	echo "obj-m := conftest.o" >build/Makefile
+	modpost_flag=''
+	test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+	if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+	rm -Rf build
+
 
-else
+	if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+	else
+		if test "x$enable_linux_builtin" != xyes; then
+
+	grep -q -E '[[:space:]]bdi_setup_and_register[[:space:]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in mm/backing-dev.c; do
+			grep -q -E "EXPORT_SYMBOL.*(bdi_setup_and_register)" \
+				"$LINUX/$file" 2>/dev/null
+			rc=$?
+			if test $rc -eq 0; then
+				export=1
+				break;
+			fi
+		done
+		if test $export -eq 0; then :
+			rc=1
+		else :
+			rc=0
+		fi
+	else :
+		rc=0
+	fi
+
+		fi
+		if test $rc -ne 0; then :
+
+		{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+		else :
 
 		{ $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -24246,8 +25412,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+		fi
+	fi
 
 
 

From 2ee4a18b2ac9c155e099db06cec320bd8cee3150 Mon Sep 17 00:00:00 2001
From: Etienne Dechamps <etienne.dechamps@ovh.net>
Date: Mon, 9 Jul 2012 11:23:00 +0200
Subject: [PATCH 5/6] Add script for builtin module building.

This commit introduces a "copy-builtin" script designed to prepare a
kernel source tree for building ZFS as a builtin module. The script
makes a full copy of all needed files, thus making the kernel source
tree fully independent of the zfs source package.

To achieve that, some compilation flags (-include, -I) have been moved
to module/Makefile. This Makefile is only used when compiling external
modules; when compiling builtin modules, a Kbuild file generated by the
configure-builtin script is used instead. This makes sure Makefiles
inside the kernel source tree does not contain references to the zfs
source package.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #851
---
 README.markdown            |   6 ++
 copy-builtin               | 121 +++++++++++++++++++++++++++++++++++++
 module/Makefile.in         |   7 ++-
 module/avl/Makefile.in     |   7 +--
 module/nvpair/Makefile.in  |   7 +--
 module/unicode/Makefile.in |   7 +--
 module/zcommon/Makefile.in |   7 +--
 module/zfs/Makefile.in     |   7 +--
 module/zpios/Makefile.in   |   7 +--
 9 files changed, 145 insertions(+), 31 deletions(-)
 create mode 100755 copy-builtin

diff --git a/README.markdown b/README.markdown
index 739370cb006e..a8abb00d3484 100644
--- a/README.markdown
+++ b/README.markdown
@@ -7,5 +7,11 @@ and ZVOL with a ZFS Posix Layer (ZPL) on the way!
     $ ./configure
     $ make pkg
 
+To copy the kernel code inside your kernel source tree for builtin
+compilation:
+
+    $ ./configure --enable-linux-builtin --with-linux=/usr/src/linux-...
+    $ ./copy-builtin /usr/src/linux-...
+
 Full documentation for building, configuring, and using ZFS can be
 found at: <http://zfsonlinux.org>
diff --git a/copy-builtin b/copy-builtin
new file mode 100755
index 000000000000..a053fd8a37aa
--- /dev/null
+++ b/copy-builtin
@@ -0,0 +1,121 @@
+#!/bin/bash
+
+set -e
+
+usage()
+{
+	echo "usage: $0 <kernel source tree>" >&2
+	exit 1
+}
+
+[ "$#" -eq 1 ] || usage
+KERNEL_DIR="$(readlink --canonicalize-existing "$1")"
+
+MODULES=()
+for MODULE_DIR in module/*
+do
+	[ -d "$MODULE_DIR" ] || continue
+	MODULES+=("${MODULE_DIR##*/}")
+done
+
+if ! [ -e 'zfs_config.h' ]
+then
+	echo >&2
+	echo "    $0: you did not run configure, or you're not in the ZFS source directory." >&2
+	echo "    $0: run configure with --with-linux=$KERNEL_DIR and --enable-linux-builtin." >&2
+	echo >&2
+	exit 1
+fi
+
+make clean || true
+
+rm -rf "$KERNEL_DIR/include/zfs" "$KERNEL_DIR/fs/zfs"
+cp --recursive include "$KERNEL_DIR/include/zfs"
+cp --recursive module "$KERNEL_DIR/fs/zfs"
+cp zfs_config.h "$KERNEL_DIR/"
+
+adjust_obj_paths()
+{
+	local FILE="$1"
+	local LINE OBJPATH
+
+	while IFS='' read -r LINE
+	do
+		OBJPATH="${LINE#\$(MODULE)-objs += }"
+		if [ "$OBJPATH" = "$LINE" ]
+		then
+			echo "$LINE"
+		else
+			echo "\$(MODULE)-objs += ${OBJPATH##*/}"
+		fi
+	done < "$FILE" > "$FILE.new"
+	mv "$FILE.new" "$FILE"
+}
+
+for MODULE in "${MODULES[@]}"
+do
+	adjust_obj_paths "$KERNEL_DIR/fs/zfs/$MODULE/Makefile"
+done
+
+cat > "$KERNEL_DIR/fs/zfs/Kconfig" <<"EOF"
+config ZFS
+	tristate "ZFS"
+	depends on SPL
+	help
+	  This is the ZFS filesystem from the ZFS On Linux project.
+
+	  See http://zfsonlinux.org/
+
+	  To compile this file system support as a module, choose M here.
+
+	  If unsure, say N.
+EOF
+
+{
+	cat <<-"EOF"
+	ZFS_MODULE_CFLAGS  = -I$(srctree)/include/zfs -I$(srctree)/include/spl 
+	ZFS_MODULE_CFLAGS += -include $(srctree)/spl_config.h -include $(srctree)/zfs_config.h
+	export ZFS_MODULE_CFLAGS
+
+	obj-$(CONFIG_ZFS) :=
+	EOF
+
+	for MODULE in "${MODULES[@]}"
+	do
+		echo 'obj-$(CONFIG_ZFS) += ' "$MODULE/"
+	done
+} > "$KERNEL_DIR/fs/zfs/Kbuild"
+
+add_after()
+{
+	local FILE="$1"
+	local MARKER="$2"
+	local NEW="$3"
+	local LINE
+
+	while IFS='' read -r LINE
+	do
+		echo "$LINE"
+
+		if [ -n "$MARKER" -a "$LINE" = "$MARKER" ]
+		then
+			echo "$NEW"
+			MARKER=''
+			if IFS='' read -r LINE
+			then
+				[ "$LINE" != "$NEW" ] && echo "$LINE"
+			fi
+		fi
+	done < "$FILE" > "$FILE.new"
+
+	mv "$FILE.new" "$FILE"
+}
+
+add_after "$KERNEL_DIR/fs/Kconfig" 'if BLOCK' 'source "fs/zfs/Kconfig"'
+add_after "$KERNEL_DIR/fs/Makefile" 'endif' 'obj-$(CONFIG_ZFS) += zfs/'
+
+echo >&2
+echo "    $0: done." >&2
+echo "    $0: now you can build the kernel with ZFS support." >&2
+echo "    $0: make sure you enable ZFS support (CONFIG_ZFS) before building." >&2
+echo >&2
diff --git a/module/Makefile.in b/module/Makefile.in
index 50cbb5891582..c69b8a35560e 100644
--- a/module/Makefile.in
+++ b/module/Makefile.in
@@ -5,6 +5,11 @@ subdir-m += zcommon
 subdir-m += zfs
 subdir-m += zpios
 
+ZFS_MODULE_CFLAGS += -include @SPL_OBJ@/spl_config.h
+ZFS_MODULE_CFLAGS += -include @abs_top_builddir@/zfs_config.h
+ZFS_MODULE_CFLAGS += -I@abs_top_srcdir@/include -I@SPL@/include -I@SPL@
+export ZFS_MODULE_CFLAGS
+
 modules:
 	@# Make the exported SPL symbols available to these modules.
 	@# They may be in the root of SPL_OBJ when building against
@@ -21,7 +26,7 @@ modules:
 		"*** - @SPL_OBJ@/module/@SPL_SYMBOLS@\n"; \
 		exit 1; \
 	fi
-	$(MAKE) -C @LINUX_OBJ@ SUBDIRS=`pwd` @KERNELMAKE_PARAMS@ $@
+	$(MAKE) -C @LINUX_OBJ@ SUBDIRS=`pwd` @KERNELMAKE_PARAMS@ CONFIG_ZFS=m $@
 
 clean:
 	@# Only cleanup the kernel build directories when CONFIG_KERNEL
diff --git a/module/avl/Makefile.in b/module/avl/Makefile.in
index efa414883283..27f9e4af4993 100644
--- a/module/avl/Makefile.in
+++ b/module/avl/Makefile.in
@@ -1,10 +1,7 @@
 MODULE := zavl
 
-EXTRA_CFLAGS  = @KERNELCPPFLAGS@
-EXTRA_CFLAGS += -include @SPL_OBJ@/spl_config.h
-EXTRA_CFLAGS += -include @abs_top_builddir@/zfs_config.h
-EXTRA_CFLAGS += -I@abs_top_srcdir@/include -I@SPL@/include -I@SPL@
+EXTRA_CFLAGS = $(ZFS_MODULE_CFLAGS) @KERNELCPPFLAGS@
 
-obj-m := $(MODULE).o
+obj-$(CONFIG_ZFS) := $(MODULE).o
 
 $(MODULE)-objs += @top_srcdir@/module/avl/avl.o
diff --git a/module/nvpair/Makefile.in b/module/nvpair/Makefile.in
index 71c748e5fcc3..b53381f6aa1b 100644
--- a/module/nvpair/Makefile.in
+++ b/module/nvpair/Makefile.in
@@ -1,11 +1,8 @@
 MODULE := znvpair
 
-EXTRA_CFLAGS  = @KERNELCPPFLAGS@
-EXTRA_CFLAGS += -include @SPL_OBJ@/spl_config.h
-EXTRA_CFLAGS += -include @abs_top_builddir@/zfs_config.h
-EXTRA_CFLAGS += -I@abs_top_srcdir@/include -I@SPL@/include -I@SPL@
+EXTRA_CFLAGS = $(ZFS_MODULE_CFLAGS) @KERNELCPPFLAGS@
 
-obj-m := $(MODULE).o
+obj-$(CONFIG_ZFS) := $(MODULE).o
 
 $(MODULE)-objs += @top_srcdir@/module/nvpair/nvpair.o
 $(MODULE)-objs += @top_srcdir@/module/nvpair/nvpair_alloc_spl.o
diff --git a/module/unicode/Makefile.in b/module/unicode/Makefile.in
index 14a46b270b04..226e23baa8d8 100644
--- a/module/unicode/Makefile.in
+++ b/module/unicode/Makefile.in
@@ -1,11 +1,8 @@
 MODULE := zunicode
 
-EXTRA_CFLAGS  = @KERNELCPPFLAGS@
-EXTRA_CFLAGS += -include @SPL_OBJ@/spl_config.h
-EXTRA_CFLAGS += -include @abs_top_builddir@/zfs_config.h
-EXTRA_CFLAGS += -I@abs_top_srcdir@/include -I@SPL@/include -I@SPL@
+EXTRA_CFLAGS = $(ZFS_MODULE_CFLAGS) @KERNELCPPFLAGS@
 
-obj-m := $(MODULE).o
+obj-$(CONFIG_ZFS) := $(MODULE).o
 
 $(MODULE)-objs += @top_srcdir@/module/unicode/u8_textprep.o
 $(MODULE)-objs += @top_srcdir@/module/unicode/uconv.o
diff --git a/module/zcommon/Makefile.in b/module/zcommon/Makefile.in
index e564b77b4926..d4f5ba7ec70e 100644
--- a/module/zcommon/Makefile.in
+++ b/module/zcommon/Makefile.in
@@ -1,11 +1,8 @@
 MODULE := zcommon
 
-EXTRA_CFLAGS  = @KERNELCPPFLAGS@
-EXTRA_CFLAGS += -include @SPL_OBJ@/spl_config.h
-EXTRA_CFLAGS += -include @abs_top_builddir@/zfs_config.h
-EXTRA_CFLAGS += -I@abs_top_srcdir@/include -I@SPL@/include -I@SPL@
+EXTRA_CFLAGS = $(ZFS_MODULE_CFLAGS) @KERNELCPPFLAGS@
 
-obj-m := $(MODULE).o
+obj-$(CONFIG_ZFS) := $(MODULE).o
 
 $(MODULE)-objs += @top_srcdir@/module/zcommon/zfs_deleg.o
 $(MODULE)-objs += @top_srcdir@/module/zcommon/zfs_prop.o
diff --git a/module/zfs/Makefile.in b/module/zfs/Makefile.in
index 5ec75a03af9a..98576d1d2ed5 100644
--- a/module/zfs/Makefile.in
+++ b/module/zfs/Makefile.in
@@ -1,11 +1,8 @@
 MODULE := zfs
 
-EXTRA_CFLAGS += @KERNELCPPFLAGS@
-EXTRA_CFLAGS += -include @SPL_OBJ@/spl_config.h
-EXTRA_CFLAGS += -include @abs_top_builddir@/zfs_config.h
-EXTRA_CFLAGS += -I@abs_top_srcdir@/include -I@SPL@/include -I@SPL@
+EXTRA_CFLAGS = $(ZFS_MODULE_CFLAGS) @KERNELCPPFLAGS@
 
-obj-m := $(MODULE).o
+obj-$(CONFIG_ZFS) := $(MODULE).o
 
 $(MODULE)-objs += @top_srcdir@/module/zfs/arc.o
 $(MODULE)-objs += @top_srcdir@/module/zfs/bplist.o
diff --git a/module/zpios/Makefile.in b/module/zpios/Makefile.in
index 93a89a91416e..437bf2287637 100644
--- a/module/zpios/Makefile.in
+++ b/module/zpios/Makefile.in
@@ -1,10 +1,7 @@
 MODULE := zpios
 
-EXTRA_CFLAGS  = @KERNELCPPFLAGS@
-EXTRA_CFLAGS += -include @SPL_OBJ@/spl_config.h
-EXTRA_CFLAGS += -include @abs_top_builddir@/zfs_config.h
-EXTRA_CFLAGS += -I@abs_top_srcdir@/include -I@SPL@/include -I@SPL@
+EXTRA_CFLAGS = $(ZFS_MODULE_CFLAGS) @KERNELCPPFLAGS@
 
-obj-m := $(MODULE).o
+obj-$(CONFIG_ZFS) := $(MODULE).o
 
 $(MODULE)-objs += @top_srcdir@/module/zpios/pios.o

From f09398cec665259a4c2f96726680fbd3b0a3bac3 Mon Sep 17 00:00:00 2001
From: Etienne Dechamps <etienne.dechamps@ovh.net>
Date: Wed, 4 Jul 2012 15:56:40 +0200
Subject: [PATCH 6/6] Use /sys/module instead of /proc/modules.

When libzfs checks if the module is loaded or not, it currently reads
/proc/modules and searches for a line matching the module name.

Unfortunately, if the module is included in the kernel itself (built-in
module), then /proc/modules won't list it, so libzfs will wrongly conclude
that the module is not loaded, thus making all ZFS userspace tools unusable.

Fortunately, all loaded modules appear as directories in /sys/module, even
built-in ones. Thus we can use /sys/module in lieu of /proc/modules to fix
the issue.

As a bonus, the code for checking becomes much simpler.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #851
---
 lib/libzfs/libzfs_util.c | 24 +++++-------------------
 1 file changed, 5 insertions(+), 19 deletions(-)

diff --git a/lib/libzfs/libzfs_util.c b/lib/libzfs/libzfs_util.c
index 982a6f05fd97..5618a5cd307f 100644
--- a/lib/libzfs/libzfs_util.c
+++ b/lib/libzfs/libzfs_util.c
@@ -608,27 +608,13 @@ libzfs_print_on_error(libzfs_handle_t *hdl, boolean_t printerr)
 static int
 libzfs_module_loaded(const char *module)
 {
-	FILE *f;
-	int result = 0;
-	char name[256];
+	const char path_prefix[] = "/sys/module/";
+	char path[256];
 
-	f = fopen("/proc/modules", "r");
-	if (f == NULL)
-		return -1;
+	memcpy(path, path_prefix, sizeof(path_prefix) - 1);
+	strcpy(path + sizeof(path_prefix) - 1, module);
 
-	while (fgets(name, sizeof(name), f)) {
-		char *c = strchr(name, ' ');
-		if (!c)
-			continue;
-		*c = 0;
-		if (strcmp(module, name) == 0) {
-			result = 1;
-			break;
-		}
-	}
-	fclose(f);
-
-	return result;
+	return (access(path, F_OK) == 0);
 }
 
 int