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 ea8490d..05f332a 100644 (file)
--- 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: */