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| author | Thomas Gleixner <tglx@linutronix.de> | 2013-02-21 22:51:38 +0000 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2013-04-04 13:18:31 -0700 |
| commit | 14a3b6abe98c8f53a13522610c257accef7321df (patch) | |
| tree | a14383c4c852d5d2268607443a61bfa437cd9bfd /include/linux/timekeeper_internal.h | |
| parent | a076b2146fabb0894cae5e0189a8ba3f1502d737 (diff) | |
| download | lwn-14a3b6abe98c8f53a13522610c257accef7321df.tar.gz lwn-14a3b6abe98c8f53a13522610c257accef7321df.zip | |
timekeeping: Store cycle_last value in timekeeper struct as well
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>
Diffstat (limited to 'include/linux/timekeeper_internal.h')
| -rw-r--r-- | include/linux/timekeeper_internal.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h index a151bd70e52b..c1825eb436ed 100644 --- a/include/linux/timekeeper_internal.h +++ b/include/linux/timekeeper_internal.h @@ -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 */ |