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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>
This commit is contained in:
OGAWA Hirofumi 2010-05-24 14:33:11 -07:00 committed by Linus Torvalds
parent fa1f68db6c
commit d8521fcc5e
1 changed files with 7 additions and 8 deletions
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15
include/linux/kernel.h
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@ -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: */