diff options
| author | John Stultz <john.stultz@linaro.org> | 2012-05-30 10:54:57 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-07-25 04:11:33 +0100 |
| commit | 09e66e8d71833a897a82ec18484b388e729b6548 (patch) | |
| tree | b8220e30454efdfec0e182ad86edff79aa719454 /kernel | |
| parent | 76117661ce2f9ecf7f969a4aeafd1c74802deae7 (diff) | |
timekeeping: Fix CLOCK_MONOTONIC inconsistency during leapsecond
This is a backport of fad0c66c4bb836d57a5f125ecd38bed653ca863a
which resolves a bug the previous commit.
Commit 6b43ae8a61 (ntp: Fix leap-second hrtimer livelock) broke the
leapsecond update of CLOCK_MONOTONIC. The missing leapsecond update to
wall_to_monotonic causes discontinuities in CLOCK_MONOTONIC.
Adjust wall_to_monotonic when NTP inserted a leapsecond.
Reported-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Tested-by: Richard Cochran <richardcochran@gmail.com>
Link: http://lkml.kernel.org/r/1338400497-12420-1-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/timekeeping.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 4780a7db129..5c9b67e8a85 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -938,6 +938,7 @@ static cycle_t logarithmic_accumulation(cycle_t offset, int shift) xtime.tv_sec++; leap = second_overflow(xtime.tv_sec); xtime.tv_sec += leap; + wall_to_monotonic.tv_sec -= leap; } /* Accumulate raw time */ @@ -1048,7 +1049,7 @@ static void update_wall_time(void) xtime.tv_sec++; leap = second_overflow(xtime.tv_sec); xtime.tv_sec += leap; - + wall_to_monotonic.tv_sec -= leap; } /* check to see if there is a new clocksource to use */ |