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authorPeter Zijlstra <peterz@infradead.org>2014-03-12 17:11:00 +0100
committerIngo Molnar <mingo@kernel.org>2014-04-18 11:40:32 +0200
commit030d0178bdbd237c1f0577f03bbc1d7140a75044 (patch)
treebba9497eca400523431e3d44469e06b9456fa843 /arch/arm/include/asm/barrier.h
parentarch,arc: Convert smp_mb__*() (diff)
downloadlinux-030d0178bdbd237c1f0577f03bbc1d7140a75044.tar.xz
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arch,arm: Convert smp_mb__*()
ARM uses ll/sc primitives that do not imply barriers for all regular atomic ops, therefore smp_mb__{before,after} need be a full barrier. Since ARM doesn't use asm-generic/barrier.h include the required definitions in its asm/barrier.h Signed-off-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Link: http://lkml.kernel.org/n/tip-yijo7sglsl7uusbp13upcuvo@git.kernel.org Cc: Albin Tonnerre <albin.tonnerre@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chen Gang <gang.chen@asianux.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nicolas Pitre <nico@linaro.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Victor Kamensky <victor.kamensky@linaro.org> Cc: Will Deacon <will.deacon@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/include/asm/barrier.h')
-rw-r--r--arch/arm/include/asm/barrier.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/include/asm/barrier.h b/arch/arm/include/asm/barrier.h
index 2f59f7443396..c6a3e73a6e24 100644
--- a/arch/arm/include/asm/barrier.h
+++ b/arch/arm/include/asm/barrier.h
@@ -79,5 +79,8 @@ do { \
#define set_mb(var, value) do { var = value; smp_mb(); } while (0)
+#define smp_mb__before_atomic() smp_mb()
+#define smp_mb__after_atomic() smp_mb()
+
#endif /* !__ASSEMBLY__ */
#endif /* __ASM_BARRIER_H */