From cf3c769b4b0dd1146da84d5cf045dcfe53bd0f13 Mon Sep 17 00:00:00 2001 From: john stultz Date: Mon, 26 Jun 2006 00:25:08 -0700 Subject: [PATCH] Time: Introduce arch generic time accessors Introduces clocksource switching code and the arch generic time accessor functions that use the clocksource infrastructure. Signed-off-by: John Stultz Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/time.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/linux/time.h') diff --git a/include/linux/time.h b/include/linux/time.h index 88d3b812841e..65dd85b2105e 100644 --- a/include/linux/time.h +++ b/include/linux/time.h @@ -102,6 +102,7 @@ extern int do_getitimer(int which, struct itimerval *value); extern void getnstimeofday(struct timespec *tv); extern struct timespec timespec_trunc(struct timespec t, unsigned gran); +extern int timekeeping_is_continuous(void); /** * timespec_to_ns - Convert timespec to nanoseconds @@ -144,6 +145,20 @@ extern struct timespec ns_to_timespec(const s64 nsec); */ extern struct timeval ns_to_timeval(const s64 nsec); +/** + * timespec_add_ns - Adds nanoseconds to a timespec + * @a: pointer to timespec to be incremented + * @ns: unsigned nanoseconds value to be added + */ +static inline void timespec_add_ns(struct timespec *a, u64 ns) +{ + ns += a->tv_nsec; + while(unlikely(ns >= NSEC_PER_SEC)) { + ns -= NSEC_PER_SEC; + a->tv_sec++; + } + a->tv_nsec = ns; +} #endif /* __KERNEL__ */ #define NFDBITS __NFDBITS -- cgit v1.2.3