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timekeeping: Calc stuff once 

Calculate the cycle interval shifted value once. No functional change,
just makes the code more readable.

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 22:51:36 +00:00 committed by John Stultz
parent 90adda98b8
commit 23a9537a69
1 changed files with 4 additions and 3 deletions
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7
kernel/time/timekeeping.c
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@ -1250,15 +1250,16 @@ static inline void accumulate_nsecs_to_secs(struct timekeeper *tk)
static cycle_t logarithmic_accumulation(struct timekeeper *tk, cycle_t offset,
u32 shift)
{
cycle_t interval = tk->cycle_interval << shift;
u64 raw_nsecs;
/* If the offset is smaller then a shifted interval, do nothing */
if (offset < tk->cycle_interval<<shift)
if (offset < interval)
return offset;
/* Accumulate one shifted interval */
offset -= tk->cycle_interval << shift;
tk->clock->cycle_last += tk->cycle_interval << shift;
offset -= interval;
tk->clock->cycle_last += interval;
tk->xtime_nsec += tk->xtime_interval << shift;
accumulate_nsecs_to_secs(tk);