Date: Sat, 26 Nov 2005 16:17:34 +0100
From: Ingo Molnar <mingo@elte.hu>
To: john stultz <johnstul@us.ibm.com>
Cc: lkml <linux-kernel@vger.kernel.org>, Darren Hart <dvhltc@us.ibm.com>,
       Nishanth Aravamudan <nacc@us.ibm.com>,
       Frank Sorenson <frank@tuxrocks.com>,
       George Anzinger <george@mvista.com>,
       Roman Zippel <zippel@linux-m68k.org>,
       Ulrich Windl <ulrich.windl@rz.uni-regensburg.de>,
       Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [patch] warn-on-once.patch
Message-ID: <20051126151734.GA15240@elte.hu>
References: <20051122013515.18537.76463.sendpatchset@cog.beaverton.ibm.com> <20051122013522.18537.97944.sendpatchset@cog.beaverton.ibm.com> <20051126145216.GB12999@elte.hu>
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* Ingo Molnar <mingo@elte.hu> wrote:

> - introduce WARN_ON_ONCE(cond)

replacement patch below - fixed bug found by Thomas Gleixner. (I've 
updated the gtod-B11-cleanup.tar.gz patchqueue with both this fix and 
the x64 fix.)

	Ingo

 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 (warn_once && (condition)) {	\
+		warn_once = 0;		\
+		WARN_ON(1);		\
+	}				\
+} while (0);
+
 #endif
-
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