Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 00463c16 authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds
Browse files

[PATCH] i386: Use early clobbers for semaphores now 



The new code does clobber the result early, so make sure to tell
gcc to not put it into the same register as a input argument

Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@osdl.org>
Acked-by: default avatarKyle McMartin <kyle@parisc-linux.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent cdb8355a

include/asm-i386/semaphore.h

+2 −2
Original line number Diff line number Diff line
@@ -126,7 +126,7 @@ static inline int down_interruptible(struct semaphore * sem) 
		"lea %1,%%eax\n\t"

		"call __down_failed_interruptible\n"

		"2:"

		:"=a" (result), "+m" (sem->count)

		:"=&a" (result), "+m" (sem->count)

		:

		:"memory");

	return result;
@@ -148,7 +148,7 @@ static inline int down_trylock(struct semaphore * sem) 
		"lea %1,%%eax\n\t"

		"call __down_failed_trylock\n\t"

		"2:\n"

		:"=a" (result), "+m" (sem->count)

		:"=&a" (result), "+m" (sem->count)

		:

		:"memory");

	return result;