From: John Stultz <john.stu...@linaro.org> 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 <richardcoch...@gmail.com> Signed-off-by: John Stultz <john.stu...@linaro.org> Tested-by: Richard Cochran <richardcoch...@gmail.com> Cc: sta...@kernel.org Link: http://lkml.kernel.org/r/1338400497-12420-1-git-send-email-john.stu...@linaro.org Signed-off-by: Thomas Gleixner <t...@linutronix.de> Cc: Prarit Bhargava <pra...@redhat.com> Cc: Thomas Gleixner <t...@linutronix.de> Cc: Linux Kernel <linux-kernel@vger.kernel.org> Signed-off-by: John Stultz <johns...@us.ibm.com> --- kernel/time/timekeeping.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 4780a7d..5c9b67e 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 */ -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
