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From: John Stultz <john.stultz@linaro.org>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: John Stultz <john.stultz@linaro.org>,
	Ingo Molnar <mingo@kernel.org>,
	Prarit Bhargava <prarit@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Andreas Schwab <schwab@linux-m68k.org>
Subject: [PATCH 1/4] time: Ensure we normalize the timekeeper in tk_xtime_add
Date: Tue, 21 Aug 2012 20:30:46 -0400	[thread overview]
Message-ID: <1345595449-34965-2-git-send-email-john.stultz@linaro.org> (raw)
In-Reply-To: <1345595449-34965-1-git-send-email-john.stultz@linaro.org>

Andreas noticed problems with resume on specific hardware
after commit 1e75fa8be9fb61e1af46b5b3b176347a4c958ca1
combined with commit b44d50dcacea0d485ca2ff9140f8cc28ee22f28d

After some digging I realized we aren't normalizing
the timekeeper after the add. This patch to correct this
resolved the issue.

Cc: Ingo Molnar <mingo@kernel.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Tested-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 kernel/time/timekeeping.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 898bef0..258164a 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -115,6 +115,7 @@ static void tk_xtime_add(struct timekeeper *tk, const struct timespec *ts)
 {
 	tk->xtime_sec += ts->tv_sec;
 	tk->xtime_nsec += (u64)ts->tv_nsec << tk->shift;
+	tk_normalize_xtime(tk);
 }
 
 static void tk_set_wall_to_mono(struct timekeeper *tk, struct timespec wtm)
-- 
1.7.9.5


  reply	other threads:[~2012-08-22  0:31 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-22  0:30 [PATCH 0/4] Time fixes for 3.6 John Stultz
2012-08-22  0:30 ` John Stultz [this message]
2012-08-22  8:50   ` [tip:timers/urgent] time: Ensure we normalize the timekeeper in tk_xtime_add tip-bot for John Stultz
2012-08-22  0:30 ` [PATCH 2/4] time: Fix casting issue in timekeeping_forward_now John Stultz
2012-08-22  8:51   ` [tip:timers/urgent] " tip-bot for Andreas Schwab
2012-08-22  0:30 ` [PATCH 3/4] time: Avoid potential shift-overflow with large shift values John Stultz
2012-08-22  8:11   ` Geert Uytterhoeven
2012-08-22  8:52   ` [tip:timers/urgent] time: Avoid potential shift overflow " tip-bot for John Stultz
2012-08-22  0:30 ` [PATCH 4/4] time: Avoid making adjustments if we havne't accumulated anything John Stultz
2012-08-22  8:52   ` [tip:timers/urgent] time: Avoid making adjustments if we haven' t " tip-bot for John Stultz

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