timekeeping: Fix lost updates to tai adjustment
authorJohn Stultz <john.stultz@linaro.org>
Thu, 12 Dec 2013 02:50:25 +0000 (18:50 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 13 Feb 2014 21:55:45 +0000 (13:55 -0800)
commit7ffbcb388ddf91af51cb24eaacb51f6f0ffd535b
tree69dbe8f5df52f1d91113c5c1a231e4d4d29e6018
parent6e4ae926d86530ec2a8bc462b97023022c8dbfc5
timekeeping: Fix lost updates to tai adjustment

commit f55c07607a38f84b5c7e6066ee1cfe433fa5643c upstream.

Since 48cdc135d4840 (Implement a shadow timekeeper), we have to
call timekeeping_update() after any adjustment to the timekeeping
structure in order to make sure that any adjustments to the structure
persist.

Unfortunately, the updates to the tai offset via adjtimex do not
trigger this update, causing adjustments to the tai offset to be
made and then over-written by the previous value at the next
update_wall_time() call.

This patch resovles the issue by calling timekeeping_update()
right after setting the tai offset.

Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kernel/time/timekeeping.c