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| author | Al Viro <viro@www.linux.org.uk> | 2005-08-23 22:47:07 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-08-23 18:43:44 -0700 |
| commit | 79fb7bdce363685b336e3f0fb8207312fd1f02fc (patch) | |
| tree | bcc10e8f4f576d525b4f2a617010f49077d03e6f /include/asm-alpha/system.h | |
| parent | 531e5ca62bd9aabef6bd8340d8ae93bac1b5caa2 (diff) | |
| download | lwn-79fb7bdce363685b336e3f0fb8207312fd1f02fc.tar.gz lwn-79fb7bdce363685b336e3f0fb8207312fd1f02fc.zip | |
[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.h | 29 |
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) 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) \ ({ \ |