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timekeeping: Store cycle_last value in timekeeper struct as well

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For implementing a shadow timekeeper and a split calculation/update
region we need to store the cycle_last value in the timekeeper and
update the value in the clocksource struct only in the update region.

Add the extra storage to the timekeeper.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
Thomas Gleixner
2013-02-21 22:51:38 +00:00
committed by John Stultz
parent a076b2146f
commit 14a3b6abe9
2 changed files with 4 additions and 2 deletions
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2
include/linux/timekeeper_internal.h
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@@ -20,6 +20,8 @@ struct timekeeper {
u32 shift;
/* Number of clock cycles in one NTP interval. */
cycle_t cycle_interval;
/* Last cycle value (also stored in clock->cycle_last) */
cycle_t cycle_last;
/* Number of clock shifted nano seconds in one NTP interval. */
u64 xtime_interval;
/* shifted nano seconds left over when rounding cycle_interval */