From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Date: Mon, 24 May 2010 21:33:11 +0000 (-0700)
Subject: printk_ratelimited(): fix uninitialized spinlock
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d8521fcc5e0ad3e79bbc4231bb20a6cdc2b50164;p=linux-beck.git

printk_ratelimited(): fix uninitialized spinlock

ratelimit_state initialization of printk_ratelimited() seems broken.  This
fixes it by using DEFINE_RATELIMIT_STATE() to initialize spinlock
properly.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index ea8490d7020e..05f332afc9e0 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -424,14 +424,13 @@ static inline char *pack_hex_byte(char *buf, u8 byte)
  * no local ratelimit_state used in the !PRINTK case
  */
 #ifdef CONFIG_PRINTK
-#define printk_ratelimited(fmt, ...)  ({		\
-	static struct ratelimit_state _rs = {		\
-		.interval = DEFAULT_RATELIMIT_INTERVAL, \
-		.burst = DEFAULT_RATELIMIT_BURST,       \
-	};                                              \
-							\
-	if (__ratelimit(&_rs))                          \
-		printk(fmt, ##__VA_ARGS__);		\
+#define printk_ratelimited(fmt, ...)  ({				\
+	static DEFINE_RATELIMIT_STATE(_rs,				\
+				      DEFAULT_RATELIMIT_INTERVAL,	\
+				      DEFAULT_RATELIMIT_BURST);		\
+									\
+	if (__ratelimit(&_rs))						\
+		printk(fmt, ##__VA_ARGS__);				\
 })
 #else
 /* No effect, but we still get type checking even in the !PRINTK case: */