linux-kernel - [PATCH] [2/3] add WARN_ON

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Message-ID: <20080310063437.GB6745@darkstar.te-china.tietoenator.com>
Date:	Mon, 10 Mar 2008 14:34:37 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, paulmck@...ux.vnet.ibm.com
Subject: [PATCH] [2/3] add WARN_ON_SECS macro

Add WARN_ON_SECS macro for some serious case which need repeat the
warnings, but with some ratelimit.

Signed-off-by: Dave Young <hidave.darkstar@...il.com>

---
include/asm-generic/bug.h |    8 ++++++++
1 file changed, 8 insertions(+)

diff -upr linux/include/asm-generic/bug.h linux.new/include/asm-generic/bug.h
--- linux/include/asm-generic/bug.h	2008-03-10 13:27:03.000000000 +0800
+++ linux.new/include/asm-generic/bug.h	2008-03-10 13:27:14.000000000 +0800
@@ -3,6 +3,7 @@
 
 #include <linux/compiler.h>
 
+
 #ifdef CONFIG_BUG
 
 #ifdef CONFIG_GENERIC_BUG
@@ -75,6 +76,13 @@ extern void warn_on_slowpath(const char 
 	unlikely(__ret_warn_once);				\
 })
 
+#define WARN_ON_SECS(condition, secs) ({			\
+	int __ret_warn_on = !!(condition);			\
+	if (unlikely(__ret_warn_on))				\
+		if (__ratelimit(secs * HZ, 1))			\
+			WARN_ON(condition);			\
+})
+
 #ifdef CONFIG_SMP
 # define WARN_ON_SMP(x)			WARN_ON(x)
 #else
--
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