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locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read()

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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 <[email protected]>
Acked-by: Jesper Nilsson <[email protected]>
Acked-by: Hans-Christian Egtvedt <[email protected]>
Acked-by: Max Filippov <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Pranith Kumar 2014-09-23 10:29:50 -04:00 • committed by Ingo Molnar
commit 2291059c85
18 changed files with 24 additions and 24 deletions
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4
arch/alpha/include/asm/atomic.h
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@ -17,8 +17,8 @@
#define ATOMIC_INIT(i) { (i) }
#define ATOMIC64_INIT(i) { (i) }
#define atomic_read(v) (*(volatile int *)&(v)->counter)
#define atomic64_read(v) (*(volatile long *)&(v)->counter)
#define atomic_read(v) ACCESS_ONCE((v)->counter)
#define atomic64_read(v) ACCESS_ONCE((v)->counter)
#define atomic_set(v,i) ((v)->counter = (i))
#define atomic64_set(v,i) ((v)->counter = (i))