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| author | Peter Zijlstra <peterz@infradead.org> | 2014-03-13 19:00:37 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-04-18 11:40:33 +0200 |
| commit | 8715466b602729061394df18864ea64b97951589 (patch) | |
| tree | 4ff3109c25f89b45b041bd9ef1360644eb2e7f77 /arch | |
| parent | 030d0178bdbd237c1f0577f03bbc1d7140a75044 (diff) | |
| download | linux-8715466b602729061394df18864ea64b97951589.tar.gz linux-8715466b602729061394df18864ea64b97951589.tar.bz2 linux-8715466b602729061394df18864ea64b97951589.zip | |
arch,arm64: Convert smp_mb__*()
AARGH64 uses ll/sc primitives that do not imply any barriers for the
normal atomics, therefore smp_mb__{before,after} should be a full
barrier.
Since AARGH64 doesn't use asm-generic/barrier.h, add the required
definitions to 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-8p5iclqgy78al33kck3ht7nr@git.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chen Gang <gang.chen@asianux.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
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')
| -rw-r--r-- | arch/arm64/include/asm/atomic.h | 5 | ||||
| -rw-r--r-- | arch/arm64/include/asm/barrier.h | 3 | ||||
| -rw-r--r-- | arch/arm64/include/asm/bitops.h | 9 |
3 files changed, 3 insertions, 14 deletions
diff --git a/arch/arm64/include/asm/atomic.h b/arch/arm64/include/asm/atomic.h index 0237f0867e37..57e8cb49824c 100644 --- a/arch/arm64/include/asm/atomic.h +++ b/arch/arm64/include/asm/atomic.h @@ -152,11 +152,6 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) #define atomic_add_negative(i,v) (atomic_add_return(i, v) < 0) -#define smp_mb__before_atomic_dec() smp_mb() -#define smp_mb__after_atomic_dec() smp_mb() -#define smp_mb__before_atomic_inc() smp_mb() -#define smp_mb__after_atomic_inc() smp_mb() - /* * 64-bit atomic operations. */ diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h index 66eb7648043b..48b9e704af7c 100644 --- a/arch/arm64/include/asm/barrier.h +++ b/arch/arm64/include/asm/barrier.h @@ -98,6 +98,9 @@ do { \ #define set_mb(var, value) do { var = value; smp_mb(); } while (0) #define nop() asm volatile("nop"); +#define smp_mb__before_atomic() smp_mb() +#define smp_mb__after_atomic() smp_mb() + #endif /* __ASSEMBLY__ */ #endif /* __ASM_BARRIER_H */ diff --git a/arch/arm64/include/asm/bitops.h b/arch/arm64/include/asm/bitops.h index aa5b59d6ba43..9c19594ce7cb 100644 --- a/arch/arm64/include/asm/bitops.h +++ b/arch/arm64/include/asm/bitops.h @@ -17,17 +17,8 @@ #define __ASM_BITOPS_H #include <linux/compiler.h> - #include <asm/barrier.h> -/* - * clear_bit may not imply a memory barrier - */ -#ifndef smp_mb__before_clear_bit -#define smp_mb__before_clear_bit() smp_mb() -#define smp_mb__after_clear_bit() smp_mb() -#endif - #ifndef _LINUX_BITOPS_H #error only <linux/bitops.h> can be included directly #endif |