redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

[PATCH] i386: Use early clobbers for semaphores now

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

4
include/asm-i386/semaphore.h
View file

@ -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;