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atomic_t: Cast to volatile when accessing atomic variables

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In preparation for removing volatile from the atomic_t definition, this
patch adds a volatile cast to all the atomic read functions.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Anton Blanchard
2010-05-17 14:33:53 +10:00
committed by Linus Torvalds
parent e40152ee1e
commit f3d46f9d31
20 changed files with 25 additions and 25 deletions
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4
arch/mips/include/asm/atomic.h
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@ -29,7 +29,7 @@
*
* Atomically reads the value of @v.
*/
#define atomic_read(v) ((v)->counter)
#define atomic_read(v) (*(volatile int *)&(v)->counter)
/*
* atomic_set - set atomic variable
@ -410,7 +410,7 @@ static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
* @v: pointer of type atomic64_t
*
*/
#define atomic64_read(v) ((v)->counter)
#define atomic64_read(v) (*(volatile long *)&(v)->counter)
/*
* atomic64_set - set atomic variable