This is a note to let you know that I've just added the patch titled
ARM: fix footbridge clockevent device
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:
arm-fix-footbridge-clockevent-device.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 <[email protected]> know about it.
>From 4ff859fe1dc0da0f87bbdfff78f527898878fa4a Mon Sep 17 00:00:00 2001
From: Russell King <[email protected]>
Date: Sun, 29 Dec 2013 12:39:50 +0000
Subject: ARM: fix footbridge clockevent device
From: Russell King <[email protected]>
commit 4ff859fe1dc0da0f87bbdfff78f527898878fa4a upstream.
The clockevents code was being told that the footbridge clock event
device ticks at 16x the rate which it actually does. This leads to
timekeeping problems since it allows the clocksource to wrap before
the kernel notices. Fix this by using the correct clock.
Fixes: 4e8d76373c9fd ("ARM: footbridge: convert to clockevents/clocksource")
Signed-off-by: Russell King <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/arm/mach-footbridge/dc21285-timer.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/arch/arm/mach-footbridge/dc21285-timer.c
+++ b/arch/arm/mach-footbridge/dc21285-timer.c
@@ -96,11 +96,12 @@ static struct irqaction footbridge_timer
void __init footbridge_timer_init(void)
{
struct clock_event_device *ce = &ckevt_dc21285;
+ unsigned rate = DIV_ROUND_CLOSEST(mem_fclk_21285, 16);
- clocksource_register_hz(&cksrc_dc21285, (mem_fclk_21285 + 8) / 16);
+ clocksource_register_hz(&cksrc_dc21285, rate);
setup_irq(ce->irq, &footbridge_timer_irq);
ce->cpumask = cpumask_of(smp_processor_id());
- clockevents_config_and_register(ce, mem_fclk_21285, 0x4, 0xffffff);
+ clockevents_config_and_register(ce, rate, 0x4, 0xffffff);
}
Patches currently in stable-queue which might be from
[email protected] are
queue-3.12/arm-fix-footbridge-clockevent-device.patch
queue-3.12/arm-7923-1-mm-fix-dcache-flush-logic-for-compound-high-pages.patch
queue-3.12/arm-fix-bad-mode-in-...-handler-message-for-undefined-instructions.patch
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