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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-04-13 23:32:13 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-04-13 23:32:13 +0100 |
| commit | a84bd2ee81ea1bdbd238cd1c380ec25f50a876c5 (patch) | |
| tree | ba054d4b1a20dadec088fd4d8983fb5939227e46 /include/asm-generic/bug.h | |
| parent | aec995900fbc8cffa9f0f9e797ef07a0beb2b079 (diff) | |
| parent | 7db6a7fa09884b34d2a5d4e6e4ed58664a5f0cf8 (diff) | |
Merge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 into fixes
Diffstat (limited to 'include/asm-generic/bug.h')
| -rw-r--r-- | include/asm-generic/bug.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index f2d2faf4d9a..e5a3f588000 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -194,6 +194,13 @@ extern void warn_slowpath_null(const char *file, const int line); #ifdef CONFIG_SMP # define WARN_ON_SMP(x) WARN_ON(x) #else +/* + * Use of ({0;}) because WARN_ON_SMP(x) may be used either as + * a stand alone line statement or as a condition in an if () + * statement. + * A simple "0" would cause gcc to give a "statement has no effect" + * warning. + */ # define WARN_ON_SMP(x) ({0;}) #endif |