diff options
Diffstat (limited to 'include/linux/clocksource.h')
| -rw-r--r-- | include/linux/clocksource.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index 830a250ecf9..daa4940cc0f 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -47,6 +47,7 @@ struct clocksource; * @mult: cycle to nanosecond multiplier * @shift: cycle to nanosecond divisor (power of two) * @flags: flags describing special properties + * @vread: vsyscall based read * @cycle_interval: Used internally by timekeeping core, please ignore. * @xtime_interval: Used internally by timekeeping core, please ignore. */ @@ -59,6 +60,7 @@ struct clocksource { u32 mult; u32 shift; unsigned long flags; + cycle_t (*vread)(void); /* timekeeping specific data, ignore */ cycle_t cycle_last, cycle_interval; @@ -197,4 +199,12 @@ extern int clocksource_register(struct clocksource*); extern struct clocksource* clocksource_get_next(void); extern void clocksource_change_rating(struct clocksource *cs, int rating); +#ifdef CONFIG_GENERIC_TIME_VSYSCALL +extern void update_vsyscall(struct timespec *ts, struct clocksource *c); +#else +static inline void update_vsyscall(struct timespec *ts, struct clocksource *c) +{ +} +#endif + #endif /* _LINUX_CLOCKSOURCE_H */ |