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authorThomas Gleixner <tglx@linutronix.de>2013-02-21 22:51:38 +0000
committerJohn Stultz <john.stultz@linaro.org>2013-04-04 13:18:31 -0700
commit14a3b6abe98c8f53a13522610c257accef7321df (patch)
treea14383c4c852d5d2268607443a61bfa437cd9bfd /kernel/time/timekeeping.c
parenta076b2146fabb0894cae5e0189a8ba3f1502d737 (diff)
downloadlinaro-lsk-14a3b6abe98c8f53a13522610c257accef7321df.tar.gz
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 'kernel/time/timekeeping.c')
-rw-r--r--kernel/time/timekeeping.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index f93f60cd97a..4c276b2d022 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -101,7 +101,7 @@ static void tk_setup_internals(struct timekeeper *tk, struct clocksource *clock)
old_clock = tk->clock;
tk->clock = clock;
- clock->cycle_last = clock->read(clock);
+ tk->cycle_last = clock->cycle_last = clock->read(clock);
/* Do the ns -> cycle conversion first, using original mult */
tmp = NTP_INTERVAL_LENGTH;
@@ -266,7 +266,7 @@ static void timekeeping_forward_now(struct timekeeper *tk)
clock = tk->clock;
cycle_now = clock->read(clock);
cycle_delta = (cycle_now - clock->cycle_last) & clock->mask;
- clock->cycle_last = cycle_now;
+ tk->cycle_last = clock->cycle_last = cycle_now;
tk->xtime_nsec += cycle_delta * tk->mult;