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authorAl Viro <viro@www.linux.org.uk>2005-08-23 17:47:07 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-23 21:43:44 -0400
commit79fb7bdce363685b336e3f0fb8207312fd1f02fc (patch)
treebcc10e8f4f576d525b4f2a617010f49077d03e6f /include/asm-alpha/system.h
parent531e5ca62bd9aabef6bd8340d8ae93bac1b5caa2 (diff)
[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>
Diffstat (limited to 'include/asm-alpha/system.h')
-rw-r--r--include/asm-alpha/system.h29
1 files changed, 13 insertions, 16 deletions
diff --git a/include/asm-alpha/system.h b/include/asm-alpha/system.h
index c08ce970ff8c..bdb4d66418f1 100644
--- a/include/asm-alpha/system.h
+++ b/include/asm-alpha/system.h
@@ -443,22 +443,19 @@ __xchg_u64(volatile long *m, unsigned long val)
443 if something tries to do an invalid xchg(). */ 443 if something tries to do an invalid xchg(). */
444extern void __xchg_called_with_bad_pointer(void); 444extern void __xchg_called_with_bad_pointer(void);
445 445
446static inline unsigned long 446#define __xchg(ptr, x, size) \
447__xchg(volatile void *ptr, unsigned long x, int size) 447({ \
448{ 448 unsigned long __xchg__res; \
449 switch (size) { 449 volatile void *__xchg__ptr = (ptr); \
450 case 1: 450 switch (size) { \
451 return __xchg_u8(ptr, x); 451 case 1: __xchg__res = __xchg_u8(__xchg__ptr, x); break; \
452 case 2: 452 case 2: __xchg__res = __xchg_u16(__xchg__ptr, x); break; \
453 return __xchg_u16(ptr, x); 453 case 4: __xchg__res = __xchg_u32(__xchg__ptr, x); break; \
454 case 4: 454 case 8: __xchg__res = __xchg_u64(__xchg__ptr, x); break; \
455 return __xchg_u32(ptr, x); 455 default: __xchg_called_with_bad_pointer(); __xchg__res = x; \
456 case 8: 456 } \
457 return __xchg_u64(ptr, x); 457 __xchg__res; \
458 } 458})
459 __xchg_called_with_bad_pointer();
460 return x;
461}
462 459
463#define xchg(ptr,x) \ 460#define xchg(ptr,x) \
464 ({ \ 461 ({ \