Linux 4.5 compat #4228
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Linux 4.5 compat #4228
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behlendorf
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FYI: got the following compilation error on my current WIP-branch: running kernel is 4.4.0 |
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It's even failing when using the patches solely against latest master, so it could be the latest changes in master causing this, thus: opened up a buildbot testing #4238 to see if that shows anything suspicious |
behlendorf
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Refreshed to fix typo in macro. That should fix the build issue for that kernel. |
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@behlendorf your branch compiled fine and the rebased patches, too (behlendorf_zfs/linux-4.5-compat_17.01.2016_rebase-16.01.2016) Thanks ! |
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@behlendorf |
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@tuxoko there were two versions of it in. It was first introduced by commit torvalds/linux@6b25539 and then changed in commit torvalds/linux@fceef39. The good news is that only the latter should ever show up in a tagged kernel but we should handle both regardless. I should also mention these changes are a little bigger than is strictly necessary. I took the opportunity to clean up and document the code so it's more maintainable. |
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I just started looking at this and see we now have a problem introduced by torvalds/linux@34c0fd54. The |
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@dweeezil man they move fast, luckily the |
The follow_link() interface was retired in favor of get_link(). In the process of phasing in get_link() the Linux kernel went through two different versions. The first of which depended on put_link() and the final version on a delayed done function. - Improved configure checks for .follow_link, .get_link, .put_link. - Interfaces checked from newest to oldest. - Strict checking for each possible known interface. - Configure fails when no known interface is available. - Both versions .get_link are detected and supported as well two previous versions of .follow_link. Signed-off-by: Brian Behlendorf <[email protected]>
behlendorf
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Rebased on master and refreshed to include the security_list issue found by @tuxoko. |
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I'll look this over again later. Other than the issue @tuxoko pointed out, the rest looked OK to me. I do actually want to build it, however, and in particular, examine the output of the autoconf scripts. |
The registered xattr .list handler was simplified in the 4.5 kernel
to only perform a permission check. Given a dentry for the file it
must return a boolean indicating if the name is visible. This
differs slightly from the previous APIs which also required the
function to copy the name in to the provided list and return its
size. That is now all the responsibility of the caller.
This should be straight forward change to make to ZoL since we've
always required the caller to make the copy. However, this was
slightly complicated by the need to support 3 older APIs. Yes,
between 2.6.32 and 4.5 there are 4 versions of this interface!
Therefore, while the functional change in this patch is small it
includes significant cleanup to make the code understandable and
maintainable. These changes include:
- Improved configure checks for .list, .get, and .set interfaces.
- Interfaces checked from newest to oldest.
- Strict checking for each possible known interface.
- Configure fails when no known interface is available.
- HAVE_*_XATTR_LIST renamed HAVE_XATTR_LIST_* for consistency
with similar iops and fops configure checks.
- POSIX_ACL_XATTR_{DEFAULT|ACCESS} were removed forcing callers to
move to their replacements, XATTR_NAME_POSIX_ACL_{DEFAULT|ACCESS}.
Compatibility wrapper were added for old kernels.
- ZPL_XATTR_LIST_WRAPPER added which behaves the same as the existing
ZPL_XATTR_{GET|SET} WRAPPERs. Only the inode is guaranteed to be
a valid pointer, passing NULL for the 'list' and 'name' variables
is allowed and must be checked for. All .list functions were
updated to use the wrapper to aid readability.
- zpl_xattr_filldir() updated to use the .list function for its
permission check which is consistent with the updated Linux 4.5
interface. If a .list function is registered it should return 0
to indicate a name should be skipped, if there is no registered
function the name will be added.
- Additional documentation from xattr(7) describing the correct
behavior for each namespace was added before the relevant handlers.
Signed-off-by: Brian Behlendorf <[email protected]>
The pfn_t typedef was inherited from Illumos but never directly used by any libspl consumers. This doesn't cause any issues in user space but for consistency with the kernel build it has been removed. See torvalds/linux/commit/34c0fd54. Signed-off-by: Brian Behlendorf <[email protected]> Requires-spl: refs/pull/524/head
behlendorf
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@behlendorf |
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@behlendorf The code LGTM. I'm still going over the autoconf tests. |
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@behlendorf All the autoconf tests LGTM. |
behlendorf
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Jan 20, 2016
The follow_link() interface was retired in favor of get_link(). In the process of phasing in get_link() the Linux kernel went through two different versions. The first of which depended on put_link() and the final version on a delayed done function. - Improved configure checks for .follow_link, .get_link, .put_link. - Interfaces checked from newest to oldest. - Strict checking for each possible known interface. - Configure fails when no known interface is available. - Both versions .get_link are detected and supported as well two previous versions of .follow_link. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue openzfs#4228
behlendorf
added a commit
to behlendorf/zfs
that referenced
this pull request
Jan 20, 2016
The registered xattr .list handler was simplified in the 4.5 kernel
to only perform a permission check. Given a dentry for the file it
must return a boolean indicating if the name is visible. This
differs slightly from the previous APIs which also required the
function to copy the name in to the provided list and return its
size. That is now all the responsibility of the caller.
This should be straight forward change to make to ZoL since we've
always required the caller to make the copy. However, this was
slightly complicated by the need to support 3 older APIs. Yes,
between 2.6.32 and 4.5 there are 4 versions of this interface!
Therefore, while the functional change in this patch is small it
includes significant cleanup to make the code understandable and
maintainable. These changes include:
- Improved configure checks for .list, .get, and .set interfaces.
- Interfaces checked from newest to oldest.
- Strict checking for each possible known interface.
- Configure fails when no known interface is available.
- HAVE_*_XATTR_LIST renamed HAVE_XATTR_LIST_* for consistency
with similar iops and fops configure checks.
- POSIX_ACL_XATTR_{DEFAULT|ACCESS} were removed forcing callers to
move to their replacements, XATTR_NAME_POSIX_ACL_{DEFAULT|ACCESS}.
Compatibility wrapper were added for old kernels.
- ZPL_XATTR_LIST_WRAPPER added which behaves the same as the existing
ZPL_XATTR_{GET|SET} WRAPPERs. Only the inode is guaranteed to be
a valid pointer, passing NULL for the 'list' and 'name' variables
is allowed and must be checked for. All .list functions were
updated to use the wrapper to aid readability.
- zpl_xattr_filldir() updated to use the .list function for its
permission check which is consistent with the updated Linux 4.5
interface. If a .list function is registered it should return 0
to indicate a name should be skipped, if there is no registered
function the name will be added.
- Additional documentation from xattr(7) describing the correct
behavior for each namespace was added before the relevant handlers.
Signed-off-by: Brian Behlendorf <[email protected]>
Signed-off-by: Tim Chase <[email protected]>
Signed-off-by: Chunwei Chen <[email protected]>
Issue openzfs#4228
behlendorf
added a commit
to behlendorf/zfs
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Jan 20, 2016
The pfn_t typedef was inherited from Illumos but never directly used by any libspl consumers. This doesn't cause any issues in user space but for consistency with the kernel build it has been removed. See torvalds/linux/commit/34c0fd54. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue openzfs#4228
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Thanks guys, merged as: openzfs/spl@de77e24 Linux 4.5 compat: pfn_t typedef |
behlendorf
added a commit
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Jan 29, 2016
The follow_link() interface was retired in favor of get_link(). In the process of phasing in get_link() the Linux kernel went through two different versions. The first of which depended on put_link() and the final version on a delayed done function. - Improved configure checks for .follow_link, .get_link, .put_link. - Interfaces checked from newest to oldest. - Strict checking for each possible known interface. - Configure fails when no known interface is available. - Both versions .get_link are detected and supported as well two previous versions of .follow_link. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue #4228
behlendorf
added a commit
that referenced
this pull request
Jan 29, 2016
The registered xattr .list handler was simplified in the 4.5 kernel
to only perform a permission check. Given a dentry for the file it
must return a boolean indicating if the name is visible. This
differs slightly from the previous APIs which also required the
function to copy the name in to the provided list and return its
size. That is now all the responsibility of the caller.
This should be straight forward change to make to ZoL since we've
always required the caller to make the copy. However, this was
slightly complicated by the need to support 3 older APIs. Yes,
between 2.6.32 and 4.5 there are 4 versions of this interface!
Therefore, while the functional change in this patch is small it
includes significant cleanup to make the code understandable and
maintainable. These changes include:
- Improved configure checks for .list, .get, and .set interfaces.
- Interfaces checked from newest to oldest.
- Strict checking for each possible known interface.
- Configure fails when no known interface is available.
- HAVE_*_XATTR_LIST renamed HAVE_XATTR_LIST_* for consistency
with similar iops and fops configure checks.
- POSIX_ACL_XATTR_{DEFAULT|ACCESS} were removed forcing callers to
move to their replacements, XATTR_NAME_POSIX_ACL_{DEFAULT|ACCESS}.
Compatibility wrapper were added for old kernels.
- ZPL_XATTR_LIST_WRAPPER added which behaves the same as the existing
ZPL_XATTR_{GET|SET} WRAPPERs. Only the inode is guaranteed to be
a valid pointer, passing NULL for the 'list' and 'name' variables
is allowed and must be checked for. All .list functions were
updated to use the wrapper to aid readability.
- zpl_xattr_filldir() updated to use the .list function for its
permission check which is consistent with the updated Linux 4.5
interface. If a .list function is registered it should return 0
to indicate a name should be skipped, if there is no registered
function the name will be added.
- Additional documentation from xattr(7) describing the correct
behavior for each namespace was added before the relevant handlers.
Signed-off-by: Brian Behlendorf <[email protected]>
Signed-off-by: Tim Chase <[email protected]>
Signed-off-by: Chunwei Chen <[email protected]>
Issue #4228
behlendorf
added a commit
that referenced
this pull request
Jan 29, 2016
The pfn_t typedef was inherited from Illumos but never directly used by any libspl consumers. This doesn't cause any issues in user space but for consistency with the kernel build it has been removed. See torvalds/linux/commit/34c0fd54. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue #4228
goulvenriou
pushed a commit
to Alyseo/zfs
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this pull request
Feb 3, 2016
The follow_link() interface was retired in favor of get_link(). In the process of phasing in get_link() the Linux kernel went through two different versions. The first of which depended on put_link() and the final version on a delayed done function. - Improved configure checks for .follow_link, .get_link, .put_link. - Interfaces checked from newest to oldest. - Strict checking for each possible known interface. - Configure fails when no known interface is available. - Both versions .get_link are detected and supported as well two previous versions of .follow_link. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue openzfs#4228
goulvenriou
pushed a commit
to Alyseo/zfs
that referenced
this pull request
Feb 3, 2016
The registered xattr .list handler was simplified in the 4.5 kernel
to only perform a permission check. Given a dentry for the file it
must return a boolean indicating if the name is visible. This
differs slightly from the previous APIs which also required the
function to copy the name in to the provided list and return its
size. That is now all the responsibility of the caller.
This should be straight forward change to make to ZoL since we've
always required the caller to make the copy. However, this was
slightly complicated by the need to support 3 older APIs. Yes,
between 2.6.32 and 4.5 there are 4 versions of this interface!
Therefore, while the functional change in this patch is small it
includes significant cleanup to make the code understandable and
maintainable. These changes include:
- Improved configure checks for .list, .get, and .set interfaces.
- Interfaces checked from newest to oldest.
- Strict checking for each possible known interface.
- Configure fails when no known interface is available.
- HAVE_*_XATTR_LIST renamed HAVE_XATTR_LIST_* for consistency
with similar iops and fops configure checks.
- POSIX_ACL_XATTR_{DEFAULT|ACCESS} were removed forcing callers to
move to their replacements, XATTR_NAME_POSIX_ACL_{DEFAULT|ACCESS}.
Compatibility wrapper were added for old kernels.
- ZPL_XATTR_LIST_WRAPPER added which behaves the same as the existing
ZPL_XATTR_{GET|SET} WRAPPERs. Only the inode is guaranteed to be
a valid pointer, passing NULL for the 'list' and 'name' variables
is allowed and must be checked for. All .list functions were
updated to use the wrapper to aid readability.
- zpl_xattr_filldir() updated to use the .list function for its
permission check which is consistent with the updated Linux 4.5
interface. If a .list function is registered it should return 0
to indicate a name should be skipped, if there is no registered
function the name will be added.
- Additional documentation from xattr(7) describing the correct
behavior for each namespace was added before the relevant handlers.
Signed-off-by: Brian Behlendorf <[email protected]>
Signed-off-by: Tim Chase <[email protected]>
Signed-off-by: Chunwei Chen <[email protected]>
Issue openzfs#4228
goulvenriou
pushed a commit
to Alyseo/zfs
that referenced
this pull request
Feb 3, 2016
The pfn_t typedef was inherited from Illumos but never directly used by any libspl consumers. This doesn't cause any issues in user space but for consistency with the kernel build it has been removed. See torvalds/linux/commit/34c0fd54. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue openzfs#4228
Flefebvre
pushed a commit
to Flefebvre/zfs
that referenced
this pull request
Feb 3, 2016
The follow_link() interface was retired in favor of get_link(). In the process of phasing in get_link() the Linux kernel went through two different versions. The first of which depended on put_link() and the final version on a delayed done function. - Improved configure checks for .follow_link, .get_link, .put_link. - Interfaces checked from newest to oldest. - Strict checking for each possible known interface. - Configure fails when no known interface is available. - Both versions .get_link are detected and supported as well two previous versions of .follow_link. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue openzfs#4228
Flefebvre
pushed a commit
to Flefebvre/zfs
that referenced
this pull request
Feb 3, 2016
The registered xattr .list handler was simplified in the 4.5 kernel
to only perform a permission check. Given a dentry for the file it
must return a boolean indicating if the name is visible. This
differs slightly from the previous APIs which also required the
function to copy the name in to the provided list and return its
size. That is now all the responsibility of the caller.
This should be straight forward change to make to ZoL since we've
always required the caller to make the copy. However, this was
slightly complicated by the need to support 3 older APIs. Yes,
between 2.6.32 and 4.5 there are 4 versions of this interface!
Therefore, while the functional change in this patch is small it
includes significant cleanup to make the code understandable and
maintainable. These changes include:
- Improved configure checks for .list, .get, and .set interfaces.
- Interfaces checked from newest to oldest.
- Strict checking for each possible known interface.
- Configure fails when no known interface is available.
- HAVE_*_XATTR_LIST renamed HAVE_XATTR_LIST_* for consistency
with similar iops and fops configure checks.
- POSIX_ACL_XATTR_{DEFAULT|ACCESS} were removed forcing callers to
move to their replacements, XATTR_NAME_POSIX_ACL_{DEFAULT|ACCESS}.
Compatibility wrapper were added for old kernels.
- ZPL_XATTR_LIST_WRAPPER added which behaves the same as the existing
ZPL_XATTR_{GET|SET} WRAPPERs. Only the inode is guaranteed to be
a valid pointer, passing NULL for the 'list' and 'name' variables
is allowed and must be checked for. All .list functions were
updated to use the wrapper to aid readability.
- zpl_xattr_filldir() updated to use the .list function for its
permission check which is consistent with the updated Linux 4.5
interface. If a .list function is registered it should return 0
to indicate a name should be skipped, if there is no registered
function the name will be added.
- Additional documentation from xattr(7) describing the correct
behavior for each namespace was added before the relevant handlers.
Signed-off-by: Brian Behlendorf <[email protected]>
Signed-off-by: Tim Chase <[email protected]>
Signed-off-by: Chunwei Chen <[email protected]>
Issue openzfs#4228
Flefebvre
pushed a commit
to Flefebvre/zfs
that referenced
this pull request
Feb 3, 2016
The pfn_t typedef was inherited from Illumos but never directly used by any libspl consumers. This doesn't cause any issues in user space but for consistency with the kernel build it has been removed. See torvalds/linux/commit/34c0fd54. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue openzfs#4228
Flefebvre
pushed a commit
to Flefebvre/zfs
that referenced
this pull request
Feb 3, 2016
The follow_link() interface was retired in favor of get_link(). In the process of phasing in get_link() the Linux kernel went through two different versions. The first of which depended on put_link() and the final version on a delayed done function. - Improved configure checks for .follow_link, .get_link, .put_link. - Interfaces checked from newest to oldest. - Strict checking for each possible known interface. - Configure fails when no known interface is available. - Both versions .get_link are detected and supported as well two previous versions of .follow_link. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue openzfs#4228
Flefebvre
pushed a commit
to Flefebvre/zfs
that referenced
this pull request
Feb 3, 2016
The registered xattr .list handler was simplified in the 4.5 kernel
to only perform a permission check. Given a dentry for the file it
must return a boolean indicating if the name is visible. This
differs slightly from the previous APIs which also required the
function to copy the name in to the provided list and return its
size. That is now all the responsibility of the caller.
This should be straight forward change to make to ZoL since we've
always required the caller to make the copy. However, this was
slightly complicated by the need to support 3 older APIs. Yes,
between 2.6.32 and 4.5 there are 4 versions of this interface!
Therefore, while the functional change in this patch is small it
includes significant cleanup to make the code understandable and
maintainable. These changes include:
- Improved configure checks for .list, .get, and .set interfaces.
- Interfaces checked from newest to oldest.
- Strict checking for each possible known interface.
- Configure fails when no known interface is available.
- HAVE_*_XATTR_LIST renamed HAVE_XATTR_LIST_* for consistency
with similar iops and fops configure checks.
- POSIX_ACL_XATTR_{DEFAULT|ACCESS} were removed forcing callers to
move to their replacements, XATTR_NAME_POSIX_ACL_{DEFAULT|ACCESS}.
Compatibility wrapper were added for old kernels.
- ZPL_XATTR_LIST_WRAPPER added which behaves the same as the existing
ZPL_XATTR_{GET|SET} WRAPPERs. Only the inode is guaranteed to be
a valid pointer, passing NULL for the 'list' and 'name' variables
is allowed and must be checked for. All .list functions were
updated to use the wrapper to aid readability.
- zpl_xattr_filldir() updated to use the .list function for its
permission check which is consistent with the updated Linux 4.5
interface. If a .list function is registered it should return 0
to indicate a name should be skipped, if there is no registered
function the name will be added.
- Additional documentation from xattr(7) describing the correct
behavior for each namespace was added before the relevant handlers.
Signed-off-by: Brian Behlendorf <[email protected]>
Signed-off-by: Tim Chase <[email protected]>
Signed-off-by: Chunwei Chen <[email protected]>
Issue openzfs#4228
Flefebvre
pushed a commit
to Flefebvre/zfs
that referenced
this pull request
Feb 3, 2016
The pfn_t typedef was inherited from Illumos but never directly used by any libspl consumers. This doesn't cause any issues in user space but for consistency with the kernel build it has been removed. See torvalds/linux/commit/34c0fd54. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue openzfs#4228
tuxoko
pushed a commit
to tuxoko/zfs
that referenced
this pull request
Feb 8, 2016
The follow_link() interface was retired in favor of get_link(). In the process of phasing in get_link() the Linux kernel went through two different versions. The first of which depended on put_link() and the final version on a delayed done function. - Improved configure checks for .follow_link, .get_link, .put_link. - Interfaces checked from newest to oldest. - Strict checking for each possible known interface. - Configure fails when no known interface is available. - Both versions .get_link are detected and supported as well two previous versions of .follow_link. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue openzfs#4228
tuxoko
pushed a commit
to tuxoko/zfs
that referenced
this pull request
Feb 8, 2016
The registered xattr .list handler was simplified in the 4.5 kernel
to only perform a permission check. Given a dentry for the file it
must return a boolean indicating if the name is visible. This
differs slightly from the previous APIs which also required the
function to copy the name in to the provided list and return its
size. That is now all the responsibility of the caller.
This should be straight forward change to make to ZoL since we've
always required the caller to make the copy. However, this was
slightly complicated by the need to support 3 older APIs. Yes,
between 2.6.32 and 4.5 there are 4 versions of this interface!
Therefore, while the functional change in this patch is small it
includes significant cleanup to make the code understandable and
maintainable. These changes include:
- Improved configure checks for .list, .get, and .set interfaces.
- Interfaces checked from newest to oldest.
- Strict checking for each possible known interface.
- Configure fails when no known interface is available.
- HAVE_*_XATTR_LIST renamed HAVE_XATTR_LIST_* for consistency
with similar iops and fops configure checks.
- POSIX_ACL_XATTR_{DEFAULT|ACCESS} were removed forcing callers to
move to their replacements, XATTR_NAME_POSIX_ACL_{DEFAULT|ACCESS}.
Compatibility wrapper were added for old kernels.
- ZPL_XATTR_LIST_WRAPPER added which behaves the same as the existing
ZPL_XATTR_{GET|SET} WRAPPERs. Only the inode is guaranteed to be
a valid pointer, passing NULL for the 'list' and 'name' variables
is allowed and must be checked for. All .list functions were
updated to use the wrapper to aid readability.
- zpl_xattr_filldir() updated to use the .list function for its
permission check which is consistent with the updated Linux 4.5
interface. If a .list function is registered it should return 0
to indicate a name should be skipped, if there is no registered
function the name will be added.
- Additional documentation from xattr(7) describing the correct
behavior for each namespace was added before the relevant handlers.
Signed-off-by: Brian Behlendorf <[email protected]>
Signed-off-by: Tim Chase <[email protected]>
Signed-off-by: Chunwei Chen <[email protected]>
Issue openzfs#4228
tuxoko
pushed a commit
to tuxoko/zfs
that referenced
this pull request
Feb 8, 2016
The pfn_t typedef was inherited from Illumos but never directly used by any libspl consumers. This doesn't cause any issues in user space but for consistency with the kernel build it has been removed. See torvalds/linux/commit/34c0fd54. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Issue openzfs#4228
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Add support for Linux 4.5 kernels. To summerize:
These changes have been lightly tested for 3.10 and the latest kernel.org kernel. Due to the significant cleanup of the autoconf code I expect the buildbot will uncover at least one build issue for a specific kernel.