diff options
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/time/timekeeping.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 6262c1d18397..5fbd9aa7df95 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -907,7 +907,7 @@ static void update_wall_time(void) * getboottime - Return the real time of system boot. * @ts: pointer to the timespec to be set * - * Returns the time of day in a timespec. + * Returns the wall-time of boot in a timespec. * * This is based on the wall_to_monotonic offset and the total suspend * time. Calls to settimeofday will affect the value returned (which @@ -925,6 +925,55 @@ void getboottime(struct timespec *ts) } EXPORT_SYMBOL_GPL(getboottime); + +/** + * get_monotonic_boottime - Returns monotonic time since boot + * @ts: pointer to the timespec to be set + * + * Returns the monotonic time since boot in a timespec. + * + * This is similar to CLOCK_MONTONIC/ktime_get_ts, but also + * includes the time spent in suspend. + */ +void get_monotonic_boottime(struct timespec *ts) +{ + struct timespec tomono, sleep; + unsigned int seq; + s64 nsecs; + + WARN_ON(timekeeping_suspended); + + do { + seq = read_seqbegin(&xtime_lock); + *ts = xtime; + tomono = wall_to_monotonic; + sleep = total_sleep_time; + nsecs = timekeeping_get_ns(); + + } while (read_seqretry(&xtime_lock, seq)); + + set_normalized_timespec(ts, ts->tv_sec + tomono.tv_sec + sleep.tv_sec, + ts->tv_nsec + tomono.tv_nsec + sleep.tv_nsec + nsecs); +} +EXPORT_SYMBOL_GPL(get_monotonic_boottime); + +/** + * ktime_get_boottime - Returns monotonic time since boot in a ktime + * + * Returns the monotonic time since boot in a ktime + * + * This is similar to CLOCK_MONTONIC/ktime_get, but also + * includes the time spent in suspend. + */ +ktime_t ktime_get_boottime(void) +{ + struct timespec ts; + + get_monotonic_boottime(&ts); + return timespec_to_ktime(ts); +} +EXPORT_SYMBOL_GPL(ktime_get_boottime); + /** * monotonic_to_bootbased - Convert the monotonic time to boot based. * @ts: pointer to the timespec to be converted |