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authorThomas Gleixner <tglx@linutronix.de>2014-07-16 21:04:58 +0000
committerJohn Stultz <john.stultz@linaro.org>2014-07-23 15:01:47 -0700
commit02cba1598a2a3b689e79ad6dad2532521f638271 (patch)
treec63b4bded9f6c6194d1c13947c8c30611e9f2b30
parent48f18fd6addc199f330d838d54fe7b0a0892adaa (diff)
timekeeping: Simplify getboottime()
Subtracting plain nsec values and converting to timespec is simpler than the whole timespec math. Not really fastpath code, so the division is not an issue. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
-rw-r--r--kernel/time/timekeeping.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index f63476fb0daf..3edc0c1d6fe8 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1525,14 +1525,9 @@ out:
void getboottime(struct timespec *ts)
{
struct timekeeper *tk = &tk_core.timekeeper;
- struct timespec boottime = {
- .tv_sec = tk->wall_to_monotonic.tv_sec +
- tk->total_sleep_time.tv_sec,
- .tv_nsec = tk->wall_to_monotonic.tv_nsec +
- tk->total_sleep_time.tv_nsec
- };
-
- set_normalized_timespec(ts, -boottime.tv_sec, -boottime.tv_nsec);
+ ktime_t t = ktime_sub(tk->offs_real, tk->offs_boot);
+
+ *ts = ktime_to_timespec(t);
}
EXPORT_SYMBOL_GPL(getboottime);