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| author | Jan Beulich <JBeulich@suse.com> | 2012-01-26 15:47:37 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2012-01-26 21:18:29 +0100 |
| commit | fc395b9291925b1880e0afc61274fe2f6ddc1269 (patch) | |
| tree | 45dc8b5453cb6d5c4db821d8dfa751b96fec93c3 /arch/x86/include/asm/cmpxchg.h | |
| parent | 5b68edc91cdc972c46f76f85eded7ffddc3ff5c2 (diff) | |
| download | lwn-fc395b9291925b1880e0afc61274fe2f6ddc1269.tar.gz lwn-fc395b9291925b1880e0afc61274fe2f6ddc1269.zip | |
x86: Properly parenthesize cmpxchg() macro arguments
Quite oddly, all of the arguments passed through from the top
level macros to the second level which didn't need parentheses
had them, while the only expression (involving a parameter)
needing them didn't.
Very recently I got bitten by the lack thereof when using
something like "array + index" for the first operand, with
"array" being an array more narrow than int.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/4F2183A9020000780006F3E6@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/cmpxchg.h')
| -rw-r--r-- | arch/x86/include/asm/cmpxchg.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/include/asm/cmpxchg.h b/arch/x86/include/asm/cmpxchg.h index 0c9fa2745f13..b3b733262909 100644 --- a/arch/x86/include/asm/cmpxchg.h +++ b/arch/x86/include/asm/cmpxchg.h @@ -145,13 +145,13 @@ extern void __add_wrong_size(void) #ifdef __HAVE_ARCH_CMPXCHG #define cmpxchg(ptr, old, new) \ - __cmpxchg((ptr), (old), (new), sizeof(*ptr)) + __cmpxchg(ptr, old, new, sizeof(*(ptr))) #define sync_cmpxchg(ptr, old, new) \ - __sync_cmpxchg((ptr), (old), (new), sizeof(*ptr)) + __sync_cmpxchg(ptr, old, new, sizeof(*(ptr))) #define cmpxchg_local(ptr, old, new) \ - __cmpxchg_local((ptr), (old), (new), sizeof(*ptr)) + __cmpxchg_local(ptr, old, new, sizeof(*(ptr))) #endif /* |