diff options
| author | Pranith Kumar <bobby.prani@gmail.com> | 2014-09-23 18:29:50 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-10-03 08:06:23 +0400 |
| commit | 2291059c852706c6f5ffb400366042b7625066cd (patch) | |
| tree | 7827b5e7992bc0d3533d5832773c6be2f4221782 /arch/arm64/include/asm/atomic.h | |
| parent | da4c54457e6d8262423aded4bcbccc4103049506 (diff) | |
| download | linux-2291059c852706c6f5ffb400366042b7625066cd.tar.xz | |
locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read()
Use the much more reader friendly ACCESS_ONCE() instead of the cast to volatile.
This is purely a stylistic change.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-arch@vger.kernel.org
Link: http://lkml.kernel.org/r/1411482607-20948-1-git-send-email-bobby.prani@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/atomic.h')
| -rw-r--r-- | arch/arm64/include/asm/atomic.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/atomic.h b/arch/arm64/include/asm/atomic.h index b83c325e587f..7047051ded40 100644 --- a/arch/arm64/include/asm/atomic.h +++ b/arch/arm64/include/asm/atomic.h @@ -35,7 +35,7 @@ * strex/ldrex monitor on some implementations. The reason we can use it for * atomic_set() is the clrex or dummy strex done on every exception return. */ -#define atomic_read(v) (*(volatile int *)&(v)->counter) +#define atomic_read(v) ACCESS_ONCE((v)->counter) #define atomic_set(v,i) (((v)->counter) = (i)) /* @@ -139,7 +139,7 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) */ #define ATOMIC64_INIT(i) { (i) } -#define atomic64_read(v) (*(volatile long *)&(v)->counter) +#define atomic64_read(v) ACCESS_ONCE((v)->counter) #define atomic64_set(v,i) (((v)->counter) = (i)) #define ATOMIC64_OP(op, asm_op) \ |