kernel/time/timekeeping_internal.h

   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
  10 extern 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
  16 static 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
  23 static 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 */