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Commit c84ef530 authored by Andi Kleen's avatar Andi Kleen Committed by Andi Kleen
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[PATCH] Use early clobber in semaphores 



New code clobbers the result always early, so tell gcc about it
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
parent 34596dc9

include/asm-x86_64/semaphore.h

+2 −2
Original line number Diff line number Diff line
@@ -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;