Fix RWSEM_SPINLOCK_IS_RAW check failed

Initialize dummy_lock to fix the build error in gcc 7.1.1 with: error: ‘dummy_lock’ is used uninitialized in this function Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Closes openzfs#622
tonyhutter · Jun 28, 2017 · 0565016 · 0565016
1 parent 4974917
commit 0565016
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/config/spl-build.m4 b/config/spl-build.m4
@@ -1311,7 +1311,8 @@ AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
 		#include <linux/rwsem.h>
 	],[
 		struct rw_semaphore dummy_semaphore __attribute__ ((unused));
-		raw_spinlock_t dummy_lock __attribute__ ((unused));
+		raw_spinlock_t dummy_lock __attribute__ ((unused)) =
+		    __RAW_SPIN_LOCK_INITIALIZER(dummy_lock);
 		dummy_semaphore.wait_lock = dummy_lock;
 	],[
 		AC_MSG_RESULT(yes)