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f40c396a9a
For now, all users of ratelimit_state allocates it statically, so DEFINE_RATELIMIT_STATE() is enough. But, I want to use ratelimit_state for fs, i.e. per super_block to suppress too many error reports. So, this adds ratelimit_state_init() to initialize ratelimite_state which is dynamically allocated, instead of opencoding. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
43 lines
961 B
C
43 lines
961 B
C
#ifndef _LINUX_RATELIMIT_H
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#define _LINUX_RATELIMIT_H
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#include <linux/param.h>
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#include <linux/spinlock.h>
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#define DEFAULT_RATELIMIT_INTERVAL (5 * HZ)
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#define DEFAULT_RATELIMIT_BURST 10
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struct ratelimit_state {
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spinlock_t lock; /* protect the state */
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int interval;
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int burst;
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int printed;
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int missed;
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unsigned long begin;
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};
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#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \
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\
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struct ratelimit_state name = { \
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.lock = __SPIN_LOCK_UNLOCKED(name.lock), \
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.interval = interval_init, \
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.burst = burst_init, \
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}
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static inline void ratelimit_state_init(struct ratelimit_state *rs,
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int interval, int burst)
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{
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spin_lock_init(&rs->lock);
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rs->interval = interval;
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rs->burst = burst;
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rs->printed = 0;
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rs->missed = 0;
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rs->begin = 0;
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}
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extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
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#define __ratelimit(state) ___ratelimit(state, __func__)
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#endif /* _LINUX_RATELIMIT_H */
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