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#ifndef _BCACHE_CLOCK_TYPES_H
#define _BCACHE_CLOCK_TYPES_H
#include "util.h"
#define NR_IO_TIMERS 8
/*
* Clocks/timers in units of sectors of IO:
*
* Note - they use percpu batching, so they're only approximate.
*/
struct io_timer;
typedef void (*io_timer_fn)(struct io_timer *);
struct io_timer {
io_timer_fn fn;
unsigned long expire;
};
/* Amount to buffer up on a percpu counter */
#define IO_CLOCK_PCPU_SECTORS 128
struct io_clock {
atomic_long_t now;
u16 __percpu *pcpu_buf;
spinlock_t timer_lock;
DECLARE_HEAP(struct io_timer *, timers);
};
#endif /* _BCACHE_CLOCK_TYPES_H */
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