We do the exact same logic moving nsecs to secs in the
timekeeper in multiple places, so condense this into a
single function.
CC: Ingo Molnar <mi...@kernel.org>
CC: Peter Zijlstra <a.p.zijls...@chello.nl>
CC: Richard Cochran <richardcoch...@gmail.com>
CC: Prarit Bhargava <pra...@redhat.com>
CC: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: John Stultz <john.stu...@linaro.org>
---
kernel/time/timekeeping.c | 54 +++++++++++++++++++++++++++------------------
1 file changed, 32 insertions(+), 22 deletions(-)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 80d0c78..5ffb2b6 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -995,6 +995,35 @@ static void timekeeping_adjust(s64 offset)
/**
+ * accumulate_nsecs_to_secs - Accumulates nsecs into secs
+ *
+ * Helper function that accumulates a the nsecs greater then a second
+ * from the xtime_nsec field to the xtime_secs field.
+ * It also calls into the NTP code to handle leapsecond processing.
+ *
+ */
+static inline void accumulate_nsecs_to_secs(struct timekeeper *tk)
+{
+ u64 nsecps = (u64)NSEC_PER_SEC << tk->shift;
+
+ while (tk->xtime_nsec >= nsecps) {
+ int leap;
+
+ tk->xtime_nsec -= nsecps;
+ tk->xtime_sec++;
+
+ /* Figure out if its a leap sec and apply if needed */
+ leap = second_overflow(tk->xtime_sec);
+ tk->xtime_sec += leap;
+ tk->wall_to_monotonic.tv_sec -= leap;
+ if (leap)
+ clock_was_set_delayed();
+
+ }
+}
+
+
+/**
* logarithmic_accumulation - shifted accumulation of cycles
*
* This functions accumulates a shifted interval of cycles into
@@ -1005,7 +1034,6 @@ static void timekeeping_adjust(s64 offset)
*/
static cycle_t logarithmic_accumulation(cycle_t offset, u32 shift)
{
- u64 nsecps = (u64)NSEC_PER_SEC << timekeeper.shift;
u64 raw_nsecs;
/* If the offset is smaller than a shifted interval, do nothing */
@@ -1017,16 +1045,8 @@ static cycle_t logarithmic_accumulation(cycle_t offset,
u32 shift)
timekeeper.clock->cycle_last += timekeeper.cycle_interval << shift;
timekeeper.xtime_nsec += timekeeper.xtime_interval << shift;
- while (timekeeper.xtime_nsec >= nsecps) {
- int leap;
- timekeeper.xtime_nsec -= nsecps;
- timekeeper.xtime_sec++;
- leap = second_overflow(timekeeper.xtime_sec);
- timekeeper.xtime_sec += leap;
- timekeeper.wall_to_monotonic.tv_sec -= leap;
- if (leap)
- clock_was_set_delayed();
- }
+
+ accumulate_nsecs_to_secs(&timekeeper);
/* Accumulate raw time */
raw_nsecs = timekeeper.raw_interval << shift;
@@ -1136,17 +1156,7 @@ static void update_wall_time(void)
* Finally, make sure that after the rounding
* xtime_nsec isn't larger than NSEC_PER_SEC
*/
- if (unlikely(timekeeper.xtime_nsec >=
- ((u64)NSEC_PER_SEC << timekeeper.shift))) {
- int leap;
- timekeeper.xtime_nsec -= (u64)NSEC_PER_SEC << timekeeper.shift;
- timekeeper.xtime_sec++;
- leap = second_overflow(timekeeper.xtime_sec);
- timekeeper.xtime_sec += leap;
- timekeeper.wall_to_monotonic.tv_sec -= leap;
- if (leap)
- clock_was_set_delayed();
- }
+ accumulate_nsecs_to_secs(&timekeeper);
timekeeping_update(false);
--
1.7.9.5
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