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isolate ratelimit from printk.c for other use

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Due to the rcupreempt.h WARN_ON trigged, I got 2G syslog file.  For some
serious complaining of kernel, we need repeat the warnings, so here I isolate
the ratelimit part of printk.c to a standalone file.

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dave Young 2008-04-29 00:59:43 -07:00 • committed by Linus Torvalds
commit 5f97a5a879
4 changed files with 54 additions and 26 deletions
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include/linux/kernel.h
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@ -188,6 +188,7 @@ extern int log_buf_copy(char *dest, int idx, int len);
extern int printk_ratelimit_jiffies;
extern int printk_ratelimit_burst;
extern int printk_ratelimit(void);
extern int __ratelimit(int ratelimit_jiffies, int ratelimit_burst);
extern int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst);
extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
unsigned int interval_msec);