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[PATCH] i386: Use early clobbers for semaphores now

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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: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@osdl.org>
Acked-by: Kyle McMartin <kyle@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen
2006-09-27 21:38:56 +02:00
committed by Linus Torvalds
parent cdb8355add
commit 00463c1633
1 changed files with 2 additions and 2 deletions
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4
include/asm-i386/semaphore.h
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@@ -126,7 +126,7 @@ static inline int down_interruptible(struct semaphore * sem)
"lea %1,%%eax\n\t" "lea %1,%%eax\n\t"
"call __down_failed_interruptible\n" "call __down_failed_interruptible\n"
"2:" "2:"
:"=a" (result), "+m" (sem->count) :"=&a" (result), "+m" (sem->count)
: :
:"memory"); :"memory");
return result; return result;
@@ -148,7 +148,7 @@ static inline int down_trylock(struct semaphore * sem)
"lea %1,%%eax\n\t" "lea %1,%%eax\n\t"
"call __down_failed_trylock\n\t" "call __down_failed_trylock\n\t"
"2:\n" "2:\n"
:"=a" (result), "+m" (sem->count) :"=&a" (result), "+m" (sem->count)
: :
:"memory"); :"memory");
return result; return result;