Commit-ID: a76ff6884bfedfafcbb0d9c84c7a6b6a546cba6d
Gitweb: http://git.kernel.org/tip/a76ff6884bfedfafcbb0d9c84c7a6b6a546cba6d
Author: Paul E. McKenney <paul...@linux.vnet.ibm.com>
AuthorDate: Wed, 1 Apr 2015 08:19:59 -0700
Committer: Paul E. McKenney <paul...@linux.vnet.ibm.com>
CommitDate: Wed, 27 May 2015 12:58:01 -0700
powerpc: Fix smp_mb__before_spinlock()
Currently, smp_mb__before_spinlock() is defined to be smp_wmb()
in core code, but this is not sufficient on PowerPC. This patch
therefore supplies an override for the generic definition to
strengthen smp_mb__before_spinlock() to smp_mb(), as is needed
on PowerPC.
Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com>
Cc: <linuxppc-dev@lists.ozlabs.org>
---
arch/powerpc/include/asm/barrier.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/include/asm/barrier.h
b/arch/powerpc/include/asm/barrier.h
index a3bf5be..1124f59 100644
--- a/arch/powerpc/include/asm/barrier.h
+++ b/arch/powerpc/include/asm/barrier.h
@@ -89,5 +89,6 @@ do {
\
#define smp_mb__before_atomic() smp_mb()
#define smp_mb__after_atomic() smp_mb()
+#define smp_mb__before_spinlock() smp_mb()
#endif /* _ASM_POWERPC_BARRIER_H */
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