43 lines
1 KiB
C
Executable file
43 lines
1 KiB
C
Executable file
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _TIMEKEEPING_INTERNAL_H
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#define _TIMEKEEPING_INTERNAL_H
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#include <linux/clocksource.h>
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#include <linux/spinlock.h>
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#include <linux/time.h>
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/*
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* timekeeping debug functions
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*/
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#ifdef CONFIG_DEBUG_FS
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extern void tk_debug_account_sleep_time(const struct timespec64 *t);
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#else
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static inline void tk_debug_account_sleep_time(const struct timespec64 *t)
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{
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pr_info("PM: Timekeeping suspended for %lld.%03lu seconds\n",
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(s64)t->tv_sec, t->tv_nsec / NSEC_PER_MSEC);
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}
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#endif
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#ifdef CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE
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static inline u64 clocksource_delta(u64 now, u64 last, u64 mask)
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{
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u64 ret = (now - last) & mask;
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/*
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* Prevent time going backwards by checking the MSB of mask in
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* the result. If set, return 0.
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*/
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return ret & ~(mask >> 1) ? 0 : ret;
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}
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#else
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static inline u64 clocksource_delta(u64 now, u64 last, u64 mask)
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{
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return (now - last) & mask;
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}
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#endif
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/* Semi public for serialization of non timekeeper VDSO updates. */
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extern raw_spinlock_t timekeeper_lock;
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#endif /* _TIMEKEEPING_INTERNAL_H */
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