[patch] warn-on-once.patch

[Ingo Molnar]

- introduce WARN_ON_ONCE(cond)

Signed-off-by: Ingo Molnar <mingo@xxxxxxx>

 include/asm-generic/bug.h |   10 ++++++++++
 1 files changed, 10 insertions(+)

Index: linux/include/asm-generic/bug.h
===================================================================
--- linux.orig/include/asm-generic/bug.h
+++ linux/include/asm-generic/bug.h
@@ -39,4 +39,14 @@
 #endif
 #endif
 
+#define WARN_ON_ONCE(condition)		\
+do {					\
+	static int warn_once = 1;	\
+					\
+	if (condition) {		\
+		warn_once = 0;		\
+		WARN_ON(1);		\
+	}				\
+} while (0);
+
 #endif
-
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