diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2014-03-13 19:00:35 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-04-18 14:20:47 +0200 |
| commit | 09a01c0ccb1837abb28afcfdd668fa0dfabed928 (patch) | |
| tree | 7ef2ffee4fbfe1b07f88d660b46dad4fef80a05e /arch/xtensa/include/asm/barrier.h | |
| parent | d00a569284b1340c16fe2c148099e077ea09ebc9 (diff) | |
arch,xtensa: Convert smp_mb__*()
Xtensa SMP has compare-and-swap which is fully serializing, therefore
its exising smp_mb__{before,after}_clear_bit() appear unduly heavy.
Implement the new barriers as barrier().
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-e9rqjxr1m1ejsob9p433kmji@git.kernel.org
Cc: Chris Zankel <chris@zankel.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-xtensa@linux-xtensa.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/xtensa/include/asm/barrier.h')
| -rw-r--r-- | arch/xtensa/include/asm/barrier.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/barrier.h b/arch/xtensa/include/asm/barrier.h index 0a24b04d6b21..5b88774c75ab 100644 --- a/arch/xtensa/include/asm/barrier.h +++ b/arch/xtensa/include/asm/barrier.h @@ -13,6 +13,9 @@ #define rmb() barrier() #define wmb() mb() +#define smp_mb__before_atomic() barrier() +#define smp_mb__after_atomic() barrier() + #include <asm-generic/barrier.h> #endif /* _XTENSA_SYSTEM_H */ |