Cregit: timekeeping

Contributors: 6
Author	Tokens	Token Proportion	Commits	Commit Proportion
Thomas Gleixner	68	59.13%	3	37.50%
Colin Cross	35	30.43%	1	12.50%
Yang Yingliang	9	7.83%	1	12.50%
John Stultz	1	0.87%	1	12.50%
Greg Kroah-Hartman	1	0.87%	1	12.50%
Ondrej Mosnáček	1	0.87%	1	12.50%
Total	115		8

/* SPDX-License-Identifier: GPL-2.0 */
#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(const struct timespec64 *t);
#else
#define tk_debug_account_sleep_time(x)
#endif

#ifdef CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE
static inline u64 clocksource_delta(u64 now, u64 last, u64 mask)
{
	u64 ret = (now - last) & mask;

	/*
	 * Prevent time going backwards by checking the MSB of mask in
	 * the result. If set, return 0.
	 */
	return ret & ~(mask >> 1) ? 0 : ret;
}
#else
static inline u64 clocksource_delta(u64 now, u64 last, u64 mask)
{
	return (now - last) & mask;
}
#endif

#endif /* _TIMEKEEPING_INTERNAL_H */

timekeeping_internal.h