linux-kernel - [tip:timers/core] timekeeping: Update tk->cycle

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Date:	Mon, 22 Apr 2013 11:32:11 -0700
From:	tip-bot for Thomas Gleixner <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org,
	hpa@...or.com, mingo@...nel.org, bp@...en8.de, jslaby@...e.cz,
	john.stultz@...aro.org, tglx@...utronix.de
Subject: [tip:timers/core] timekeeping: Update tk->cycle_last in resume

Commit-ID:  77c675ba18836802f6b73d2d773481d06ebc0f04
Gitweb:     http://git.kernel.org/tip/77c675ba18836802f6b73d2d773481d06ebc0f04
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Mon, 22 Apr 2013 09:37:04 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 22 Apr 2013 20:17:51 +0200

timekeeping: Update tk->cycle_last in resume

commit 7ec98e15aa (timekeeping: Delay update of clock->cycle_last)
forgot to update tk->cycle_last in the resume path. This results in a
stale value versus clock->cycle_last and prevents resume in the worst
case.

Reported-by: Jiri Slaby <jslaby@...e.cz>
Reported-and-tested-by: Borislav Petkov <bp@...en8.de>
Acked-by: John Stultz <john.stultz@...aro.org>
Cc: Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>
Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1304211648150.21884@ionos
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/time/timekeeping.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 675f720..98cd470 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -951,7 +951,7 @@ static void timekeeping_resume(void)
 		__timekeeping_inject_sleeptime(tk, &ts_delta);
 
 	/* Re-base the last cycle value */
-	clock->cycle_last = cycle_now;
+	tk->cycle_last = clock->cycle_last = cycle_now;
 	tk->ntp_error = 0;
 	timekeeping_suspended = 0;
 	timekeeping_update(tk, false, true);
--
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