LXR linux/kernel/time/timekeeping

   1#ifndef _TIMEKEEPING_INTERNAL_H
   2#define _TIMEKEEPING_INTERNAL_H
   3/*
   4 * timekeeping debug functions
   5 */
   6#include <linux/clocksource.h>
   7#include <linux/time.h>
   8
   9#ifdef CONFIG_DEBUG_FS
  10extern void tk_debug_account_sleep_time(struct timespec64 *t);
  11#else
  12#define tk_debug_account_sleep_time(x)
  13#endif
  14
  15#ifdef CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE
  16static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask)
  17{
  18        cycle_t ret = (now - last) & mask;
  19
  20        return (s64) ret > 0 ? ret : 0;
  21}
  22#else
  23static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask)
  24{
  25        return (now - last) & mask;
  26}
  27#endif
  28
  29#endif /* _TIMEKEEPING_INTERNAL_H */
  30