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locking/arch: Add WRITE_ONCE() to set_mb()

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Since we assume set_mb() to result in a single store followed by a
full memory barrier, employ WRITE_ONCE().

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra
2015-05-12 10:52:27 +02:00
committed by Ingo Molnar
parent 6ce47fd961
commit ab3f02fc23
12 changed files with 12 additions and 12 deletions
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2
include/asm-generic/barrier.h
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@@ -67,7 +67,7 @@
#endif
#ifndef set_mb
#define set_mb(var, value) do { (var) = (value); mb(); } while (0)
#define set_mb(var, value) do { WRITE_ONCE(var, value); mb(); } while (0)
#endif
#ifndef smp_mb__before_atomic