[mirror_ubuntu-artful-kernel.git] / kernel / time / timekeeping_internal.h

#ifndef _TIMEKEEPING_INTERNAL_H
#define _TIMEKEEPING_INTERNAL_H
/*
 * timekeeping debug functions
 */
#include <linux/clocksource.h>
#include <linux/time.h>

#ifdef CONFIG_DEBUG_FS
extern void tk_debug_account_sleep_time(struct timespec64 *t);
#else
#define tk_debug_account_sleep_time(x)
#endif

#ifdef CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE
static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask)
{
	cycle_t ret = (now - last) & mask;

	return (s64) ret > 0 ? ret : 0;
}
#else
static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask)
{
	return (now - last) & mask;
}
#endif

#endif /* _TIMEKEEPING_INTERNAL_H */
Commit	Line	Data
5c83545f CC	1	#ifndef _TIMEKEEPING_INTERNAL_H
	2	#define _TIMEKEEPING_INTERNAL_H
	3	/*
	4	* timekeeping debug functions
	5	*/
3a978377	6	#include <linux/clocksource.h>
5c83545f CC	7	#include <linux/time.h>
	8
	9	#ifdef CONFIG_DEBUG_FS
7d489d15	10	extern void tk_debug_account_sleep_time(struct timespec64 *t);
5c83545f CC	11	#else
	12	#define tk_debug_account_sleep_time(x)
	13	#endif
	14
09ec5442 TG	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
3a978377 TG	23	static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask)
	24	{
	25	return (now - last) & mask;
	26	}
09ec5442	27	#endif
3a978377	28
5c83545f	29	#endif /* _TIMEKEEPING_INTERNAL_H */