timekeeping: Delay update of clock->cycle_last
For calculating the new timekeeper values store the new cycle_last
value in the timekeeper and update the clock->cycle_last just when we
actually update the new values.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 4c276b2d..38ac782 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1271,7 +1271,7 @@
/* Accumulate one shifted interval */
offset -= interval;
- tk->clock->cycle_last += interval;
+ tk->cycle_last += interval;
tk->xtime_nsec += tk->xtime_interval << shift;
accumulate_nsecs_to_secs(tk);
@@ -1386,6 +1386,8 @@
*/
accumulate_nsecs_to_secs(tk);
+ /* Update clock->cycle_last with the new value */
+ clock->cycle_last = tk->cycle_last;
timekeeping_update(tk, false);
out:
