kernel/time/timekeeping.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _KERNEL_TIME_TIMEKEEPING_H
0003 #define _KERNEL_TIME_TIMEKEEPING_H
0004 /*
0005  * Internal interfaces for kernel/time/
0006  */
0007 extern ktime_t ktime_get_update_offsets_now(unsigned int *cwsseq,
0008                         ktime_t *offs_real,
0009                         ktime_t *offs_boot,
0010                         ktime_t *offs_tai);
0011
0012 extern int timekeeping_valid_for_hres(void);
0013 extern u64 timekeeping_max_deferment(void);
0014 extern void timekeeping_warp_clock(void);
0015 extern int timekeeping_suspend(void);
0016 extern void timekeeping_resume(void);
0017 #ifdef CONFIG_GENERIC_SCHED_CLOCK
0018 extern int sched_clock_suspend(void);
0019 extern void sched_clock_resume(void);
0020 #else
0021 static inline int sched_clock_suspend(void) { return 0; }
0022 static inline void sched_clock_resume(void) { }
0023 #endif
0024
0025 extern void update_process_times(int user);
0026 extern void do_timer(unsigned long ticks);
0027 extern void update_wall_time(void);
0028
0029 extern raw_spinlock_t jiffies_lock;
0030 extern seqcount_raw_spinlock_t jiffies_seq;
0031
0032 #define CS_NAME_LEN 32
0033
0034 #endif