This is a note to let you know that I've just added the patch titled timer: Fix jiffies wrap behavior of round_jiffies_common() to the 3.10-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: timer-fix-jiffies-wrap-behavior-of-round_jiffies_common.patch and it can be found in the queue-3.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 9e04d3804d3ac97d8c03a41d78d0f0674b5d01e1 Mon Sep 17 00:00:00 2001 From: Bart Van Assche <bart.vanassche@xxxxxxxxx> Date: Tue, 21 May 2013 20:43:50 +0200 Subject: timer: Fix jiffies wrap behavior of round_jiffies_common() From: Bart Van Assche <bart.vanassche@xxxxxxxxx> commit 9e04d3804d3ac97d8c03a41d78d0f0674b5d01e1 upstream. Direct compare of jiffies related values does not work in the wrap around case. Replace it with time_is_after_jiffies(). Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx> Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxx> Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/519BC066.5080600@xxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/timer.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) --- a/kernel/timer.c +++ b/kernel/timer.c @@ -149,9 +149,11 @@ static unsigned long round_jiffies_commo /* now that we have rounded, subtract the extra skew again */ j -= cpu * 3; - if (j <= jiffies) /* rounding ate our timeout entirely; */ - return original; - return j; + /* + * Make sure j is still in the future. Otherwise return the + * unmodified value. + */ + return time_is_after_jiffies(j) ? j : original; } /** Patches currently in stable-queue which might be from bart.vanassche@xxxxxxxxx are queue-3.10/timer-fix-jiffies-wrap-behavior-of-round_jiffies_common.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html