1 #ifndef _TIMEKEEPING_INTERNAL_H
2 #define _TIMEKEEPING_INTERNAL_H
4 * timekeeping debug functions
6 #include <linux/clocksource.h>
7 #include <linux/time.h>
10 extern void tk_debug_account_sleep_time(struct timespec64 *t);
12 #define tk_debug_account_sleep_time(x)
15 #ifdef CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE
16 static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask)
18 cycle_t ret = (now - last) & mask;
21 * Prevent time going backwards by checking the MSB of mask in
22 * the result. If set, return 0.
24 return ret & ~(mask >> 1) ? 0 : ret;
27 static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask)
29 return (now - last) & mask;
33 extern time64_t __ktime_get_real_seconds(void);
35 #endif /* _TIMEKEEPING_INTERNAL_H */