[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>

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;