Commit 74bb6a09 authored by Ingo Molnar's avatar Ingo Molnar Committed by Linus Torvalds
Browse files

[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: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 69755652
......@@ -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
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