time: Avoid making adjustments if we haven't accumulated anything
authorJohn Stultz <john.stultz@linaro.org>
Wed, 22 Aug 2012 00:30:49 +0000 (20:30 -0400)
committerThomas Gleixner <tglx@linutronix.de>
Wed, 22 Aug 2012 08:42:13 +0000 (10:42 +0200)
commitbf2ac312195155511a0f79325515cbb61929898a
tree514057045cf52d3da13f551661131fd102f67376
parent6ea565a9be32a3c8d1092017686f183b6d8c4514
time: Avoid making adjustments if we haven't accumulated anything

If update_wall_time() is called and the current offset isn't large
enough to accumulate, avoid re-calling timekeeping_adjust which may
change the clock freq and can cause 1ns inconsistencies with
CLOCK_REALTIME_COARSE/CLOCK_MONOTONIC_COARSE.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1345595449-34965-5-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
kernel/time/timekeeping.c