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[PATCH] introduce WARN_ON_ONCE(cond)

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Add WARN_ON_ONCE(cond) to print once-per-bootup messages.

[rostedt@goodmis.org: improve code generation]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-06-25 05:48:09 -07:00 committed by Linus Torvalds
parent 69755652c9
commit 74bb6a09b2
1 changed files with 13 additions and 0 deletions
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13
include/asm-generic/bug.h
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@ -38,4 +38,17 @@
#endif #endif
#endif #endif
#define WARN_ON_ONCE(condition) \
({ \
static int __warn_once = 1; \
int __ret = 0; \
\
if (unlikely((condition) && __warn_once)) { \
__warn_once = 0; \
WARN_ON(1); \
__ret = 1; \
} \
__ret; \
})
#endif #endif