This is a note to let you know that I've just added the patch titled
timekeeping: Fix missing timekeeping_update in suspend path
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
timekeeping-fix-missing-timekeeping_update-in-suspend-path.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 330a1617b0a6268d427aa5922c94d082b1d3e96d Mon Sep 17 00:00:00 2001
From: John Stultz <john.stultz@xxxxxxxxxx>
Date: Wed, 11 Dec 2013 19:10:36 -0800
Subject: timekeeping: Fix missing timekeeping_update in suspend path
From: John Stultz <john.stultz@xxxxxxxxxx>
commit 330a1617b0a6268d427aa5922c94d082b1d3e96d 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.
In the timekeeping suspend path, we udpate the timekeeper
structure, so we should be sure to update the shadow-timekeeper
before releasing the timekeeping locks. Currently this isn't done.
In most cases, the next time related code to run would be
timekeeping_resume, which does update the shadow-timekeeper, but
in an abundence of caution, this patch adds the call to
timekeeping_update() in the suspend path.
Cc: Sasha Levin <sasha.levin@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Prarit Bhargava <prarit@xxxxxxxxxx>
Cc: Richard Cochran <richardcochran@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/time/timekeeping.c | 2 ++
1 file changed, 2 insertions(+)
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1024,6 +1024,8 @@ static int timekeeping_suspend(void)
timekeeping_suspend_time =
timespec_add(timekeeping_suspend_time, delta_delta);
}
+
+ timekeeping_update(tk, TK_MIRROR);
write_seqcount_end(&timekeeper_seq);
raw_spin_unlock_irqrestore(&timekeeper_lock, flags);
Patches currently in stable-queue which might be from john.stultz@xxxxxxxxxx are
queue-3.12/timekeeping-fix-missing-timekeeping_update-in-suspend-path.patch
queue-3.12/3.13.y-timekeeping-fix-clock_set-clock_was_set-think-o.patch
queue-3.12/timekeeping-fix-potential-lost-pv-notification-of-time-change.patch
queue-3.12/timekeeping-fix-lost-updates-to-tai-adjustment.patch
queue-3.12/timekeeping-fix-clock_tai-timer-nanosleep-delays.patch
queue-3.12/timekeeping-avoid-possible-deadlock-from-clock_was_set_delayed.patch
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