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| author | Ingo Molnar <mingo@elte.hu> | 2006-06-25 05:48:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-25 10:01:11 -0700 |
| commit | 74bb6a09b2e1e69d91eb6069eb4a7f0c06b84812 (patch) | |
| tree | f55af6ec05bd7f547abf4cf9384e94570076d8c3 /include/asm-generic/bug.h | |
| parent | 69755652c92106855b4b096b7c2935b59e6252c6 (diff) | |
| download | linux-74bb6a09b2e1e69d91eb6069eb4a7f0c06b84812.tar.bz2 | |
[PATCH] introduce WARN_ON_ONCE(cond)
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>
Diffstat (limited to 'include/asm-generic/bug.h')
| -rw-r--r-- | include/asm-generic/bug.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index 0cd9711895fa..845cb67ad8ea 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -38,4 +38,17 @@ #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 |