Gitiles
Code Review Sign In
review.evervolv.com / android_kernel_htc_msm8960 / 12f0258d5b44b3b5a9442ec461bbac1f7edab8c6 / . / include / linux / ratelimit.h
blob: 03ff67b0cdf5403deab6f69924c3f9a419e644db [file] [log] [blame]
Dave Young717115e2008-07-25 01:45:58 -0700[diff] [blame]1#ifndef _LINUX_RATELIMIT_H
2#define _LINUX_RATELIMIT_H
Dave Young717115e2008-07-25 01:45:58 -0700[diff] [blame]3
Ingo Molnar979f6932009-09-22 14:44:11 +0200[diff] [blame]4#include <linux/param.h>
OGAWA Hirofumif40c3962010-05-24 14:33:11 -0700[diff] [blame]5#include <linux/spinlock.h>
Ingo Molnar979f6932009-09-22 14:44:11 +0200[diff] [blame]6
7#define DEFAULT_RATELIMIT_INTERVAL (5 * HZ)
8#define DEFAULT_RATELIMIT_BURST 10
Dave Young717115e2008-07-25 01:45:58 -0700[diff] [blame]9
10struct ratelimit_state {
Ingo Molnar979f6932009-09-22 14:44:11 +0200[diff] [blame]11 spinlock_t lock; /* protect the state */
12
13 int interval;
14 int burst;
15 int printed;
16 int missed;
17 unsigned long begin;
Dave Young717115e2008-07-25 01:45:58 -0700[diff] [blame]18};
19
Ingo Molnar979f6932009-09-22 14:44:11 +0200[diff] [blame]20#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \
21 \
22 struct ratelimit_state name = { \
23 .lock = __SPIN_LOCK_UNLOCKED(name.lock), \
24 .interval = interval_init, \
25 .burst = burst_init, \
26 }
Dave Young717115e2008-07-25 01:45:58 -0700[diff] [blame]27
OGAWA Hirofumif40c3962010-05-24 14:33:11 -0700[diff] [blame]28static inline void ratelimit_state_init(struct ratelimit_state *rs,
29 int interval, int burst)
30{
31 spin_lock_init(&rs->lock);
32 rs->interval = interval;
33 rs->burst = burst;
34 rs->printed = 0;
35 rs->missed = 0;
36 rs->begin = 0;
37}
38
Namhyung Kimf5d87d82010-10-26 14:22:49 -0700[diff] [blame]39extern struct ratelimit_state printk_ratelimit_state;
40
Christian Borntraeger5c828712009-10-23 14:58:11 +0200[diff] [blame]41extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
42#define __ratelimit(state) ___ratelimit(state, __func__)
Ingo Molnar979f6932009-09-22 14:44:11 +0200[diff] [blame]43
44#endif /* _LINUX_RATELIMIT_H */