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[PATCH] alpha xchg fix 

alpha xchg has to be a macro - alpha disables always_inline and if that
puppy does not get inlined, we immediately blow up on undefined reference.
Happens even on gcc3; with gcc4 that happens a _lot_.

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Al Viro 2005-08-23 22:47:07 +01:00 committed by Linus Torvalds
parent 531e5ca62b
commit 79fb7bdce3
1 changed files with 13 additions and 16 deletions
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29
include/asm-alpha/system.h
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@ -443,22 +443,19 @@ __xchg_u64(volatile long *m, unsigned long val)
if something tries to do an invalid xchg(). */
extern void __xchg_called_with_bad_pointer(void);
static inline unsigned long
__xchg(volatile void *ptr, unsigned long x, int size)
{
switch (size) {
case 1:
return __xchg_u8(ptr, x);
case 2:
return __xchg_u16(ptr, x);
case 4:
return __xchg_u32(ptr, x);
case 8:
return __xchg_u64(ptr, x);
}
__xchg_called_with_bad_pointer();
return x;
}
#define __xchg(ptr, x, size) \
({ \
unsigned long __xchg__res; \
volatile void *__xchg__ptr = (ptr); \
switch (size) { \
case 1: __xchg__res = __xchg_u8(__xchg__ptr, x); break; \
case 2: __xchg__res = __xchg_u16(__xchg__ptr, x); break; \
case 4: __xchg__res = __xchg_u32(__xchg__ptr, x); break; \
case 8: __xchg__res = __xchg_u64(__xchg__ptr, x); break; \
default: __xchg_called_with_bad_pointer(); __xchg__res = x; \
} \
__xchg__res; \
})
#define xchg(ptr,x) \
({ \