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power: improve inline asm memory constraints

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Use "+m" rather than a combination of "=m" and "m" for improved
clarity and consistency.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Linus Torvalds
2006-07-08 15:00:28 -07:00
parent a496e25dfb
commit e2a3d40258
3 changed files with 32 additions and 32 deletions
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16
include/asm-powerpc/system.h
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@ -220,8 +220,8 @@ __xchg_u32(volatile void *p, unsigned long val)
" stwcx. %3,0,%2 \n\
bne- 1b"
ISYNC_ON_SMP
: "=&r" (prev), "=m" (*(volatile unsigned int *)p)
: "r" (p), "r" (val), "m" (*(volatile unsigned int *)p)
: "=&r" (prev), "+m" (*(volatile unsigned int *)p)
: "r" (p), "r" (val)
: "cc", "memory");
return prev;
@ -240,8 +240,8 @@ __xchg_u64(volatile void *p, unsigned long val)
" stdcx. %3,0,%2 \n\
bne- 1b"
ISYNC_ON_SMP
: "=&r" (prev), "=m" (*(volatile unsigned long *)p)
: "r" (p), "r" (val), "m" (*(volatile unsigned long *)p)
: "=&r" (prev), "+m" (*(volatile unsigned long *)p)
: "r" (p), "r" (val)
: "cc", "memory");
return prev;
@ -299,8 +299,8 @@ __cmpxchg_u32(volatile unsigned int *p, unsigned long old, unsigned long new)
ISYNC_ON_SMP
"\n\
2:"
: "=&r" (prev), "=m" (*p)
: "r" (p), "r" (old), "r" (new), "m" (*p)
: "=&r" (prev), "+m" (*p)
: "r" (p), "r" (old), "r" (new)
: "cc", "memory");
return prev;
@ -322,8 +322,8 @@ __cmpxchg_u64(volatile unsigned long *p, unsigned long old, unsigned long new)
ISYNC_ON_SMP
"\n\
2:"
: "=&r" (prev), "=m" (*p)
: "r" (p), "r" (old), "r" (new), "m" (*p)
: "=&r" (prev), "+m" (*p)
: "r" (p), "r" (old), "r" (new)
: "cc", "memory");
return prev;