#ifndef _TIMEKEEPING_INTERNAL_H#define _TIMEKEEPING_INTERNAL_H/* * timekeeping debug functions */#include <linux/clocksource.h>#include <linux/time.h> #ifdef CONFIG_DEBUG_FSextern void tk_debug_account_sleep_time(struct timespec64 *t);#else#define tk_debug_account_sleep_time(x)#endif #ifdef CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLEstatic 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;}#elsestatic inline u64 clocksource_delta(u64 now, u64 last, u64 mask){	return (now - last) & mask;}#endif extern time64_t __ktime_get_real_seconds(void); #endif /* _TIMEKEEPING_INTERNAL_H */