linux-kernel - [PATCH resend] vsprintf: use WARN_ON

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Message-ID: <4A918A64.9040201@gmail.com>
Date:	Sun, 23 Aug 2009 20:28:52 +0200
From:	Marcin Slusarz <marcin.slusarz@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Mike Frysinger <vapier@...too.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Lai Jiangshan <laijs@...fujitsu.com>
Subject: [PATCH resend] vsprintf: use WARN_ON_ONCE

From: Marcin Slusarz <marcin.slusarz@...il.com>
Subject: vsprintf: use WARN_ON_ONCE

Signed-off-by: Marcin Slusarz <marcin.slusarz@...il.com>

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 756ccaf..a63bb18 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -983,13 +983,8 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 
 	/* Reject out-of-range values early.  Large positive sizes are
 	   used for unknown buffer sizes. */
-	if (unlikely((int) size < 0)) {
-		/* There can be only one.. */
-		static char warn = 1;
-		WARN_ON(warn);
-		warn = 0;
+	if (WARN_ON_ONCE((int) size < 0))
 		return 0;
-	}
 
 	str = buf;
 	end = buf + size;
@@ -1439,13 +1434,8 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
 
 	struct printf_spec spec = {0};
 
-	if (unlikely((int) size < 0)) {
-		/* There can be only one.. */
-		static char warn = 1;
-		WARN_ON(warn);
-		warn = 0;
+	if (WARN_ON_ONCE((int) size < 0))
 		return 0;
-	}
 
 	str = buf;
 	end = buf + size;
--
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