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| author | Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | 2007-05-08 11:34:20 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 22:15:19 +0400 |
| commit | e656e245d5adf19f3c431e7f7792659c204e32f2 (patch) | |
| tree | 55c58fcf25c8a7d527dae3b4fa271aa7ec3dc944 | |
| parent | bb2382c3e4395ab595278cc7b92ac3f2eaf23f66 (diff) | |
| download | linux-e656e245d5adf19f3c431e7f7792659c204e32f2.tar.xz | |
atomic.h: i386 type safety fix
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>
| -rw-r--r-- | include/asm-i386/atomic.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/asm-i386/atomic.h b/include/asm-i386/atomic.h index 4dd272331361..08935113206a 100644 --- a/include/asm-i386/atomic.h +++ b/include/asm-i386/atomic.h @@ -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))) \ |