Commit-ID: 02cba1598a2a3b689e79ad6dad2532521f638271
Gitweb: http://git.kernel.org/tip/02cba1598a2a3b689e79ad6dad2532521f638271
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Wed, 16 Jul 2014 21:04:58 +0000
Committer: John Stultz <john.stultz@xxxxxxxxxx>
CommitDate: Wed, 23 Jul 2014 15:01:47 -0700
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@xxxxxxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
kernel/time/timekeeping.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index f63476f..3edc0c1 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);
--
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