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| author | Andi Kleen <ak@suse.de> | 2006-09-30 01:47:55 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-30 01:47:55 +0200 |
| commit | c84ef5305930d19bdd6cd576b3a3a73786a82e57 (patch) | |
| tree | 26f9b94efa67ce79cf89dee251ac519804cab793 /include/asm-x86_64/semaphore.h | |
| parent | [PATCH] Define vsyscall cache as blob to make clearer that user space shouldn... (diff) | |
| download | linux-c84ef5305930d19bdd6cd576b3a3a73786a82e57.tar.xz linux-c84ef5305930d19bdd6cd576b3a3a73786a82e57.zip | |
[PATCH] Use early clobber in semaphores
New code clobbers the result always early, so tell gcc about it
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'include/asm-x86_64/semaphore.h')
| -rw-r--r-- | include/asm-x86_64/semaphore.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-x86_64/semaphore.h b/include/asm-x86_64/semaphore.h index 107bd90429e8..1194888536b9 100644 --- a/include/asm-x86_64/semaphore.h +++ b/include/asm-x86_64/semaphore.h @@ -132,7 +132,7 @@ static inline int down_interruptible(struct semaphore * sem) "jns 2f\n\t" "call __down_failed_interruptible\n" "2:\n" - :"=a" (result), "=m" (sem->count) + :"=&a" (result), "=m" (sem->count) :"D" (sem) :"memory"); return result; @@ -153,7 +153,7 @@ static inline int down_trylock(struct semaphore * sem) "jns 2f\n\t" "call __down_failed_trylock\n\t" "2:\n" - :"=a" (result), "=m" (sem->count) + :"=&a" (result), "=m" (sem->count) :"D" (sem) :"memory","cc"); return result; |