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atomic.h: i386 type safety fix

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Remove an explicit cast to an integer type for the result returned by cmpxchg.
 It is not per se a problem on the i386 architecture, because sizeof(int) ==
sizeof(long), but whenever this code is cut'n'pasted to a accept passing an
atomic64_t value as parameter to cmpxchg, xchg and add_unless, having 64 bits
inputs casted to 32 bits.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mathieu Desnoyers 2007-05-08 00:34:20 -07:00 committed by Linus Torvalds
parent bb2382c3e4
commit e656e245d5
1 changed files with 3 additions and 3 deletions
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6
include/asm-i386/atomic.h
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@ -207,8 +207,8 @@ static __inline__ int atomic_sub_return(int i, atomic_t *v)
return atomic_add_return(-i,v);
}
#define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new))
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))
#define atomic_xchg(v, new) (xchg(&((v)->counter), (new)))
/**
* atomic_add_unless - add unless the number is already a given value
@ -221,7 +221,7 @@ static __inline__ int atomic_sub_return(int i, atomic_t *v)
*/
#define atomic_add_unless(v, a, u) \
({ \
int c, old; \
__typeof__((v)->counter) c, old; \
c = atomic_read(v); \
for (;;) { \
if (unlikely(c == (u))) \