linux-kernel - [PATCH 4/4] clockevents: remove related device from clockevents

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Message-Id: <1260450459-18072-5-git-send-email-dfeng@redhat.com>
Date:	Thu, 10 Dec 2009 21:07:39 +0800
From:	Xiaotian Feng <dfeng@...hat.com>
To:	tglx@...utronix.de, damm@...l.co.jp, hsweeten@...ionengravers.com,
	akpm@...ux-foundation.org, venkatesh.pallipadi@...el.com
Cc:	linux-kernel@...r.kernel.org, Xiaotian Feng <dfeng@...hat.com>
Subject: [PATCH 4/4] clockevents: remove related device from clockevents_released list when cpu is DEAD

We have converted clockevent_devices to store all active devices, and
clockevents_released to store all fail-to-add/replace-out devices. So
at cpu offline stage, we should clear the clockevents related with the
offline cpu.

Signed-off-by: Xiaotian Feng <dfeng@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Magnus Damm <damm@...l.co.jp>
Cc: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
---
 kernel/time/clockevents.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index babcb30..d27fcba 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -246,6 +246,7 @@ void clockevents_notify(unsigned long reason, void *arg)
 {
 	struct clock_event_device *dev, *tmp;
 	unsigned long flags;
+	int *cpup;
 
 	spin_lock_irqsave(&clockevents_lock, flags);
 	clockevents_do_notify(reason, arg);
@@ -256,8 +257,10 @@ void clockevents_notify(unsigned long reason, void *arg)
 		 * Unregister the clock event devices which were
 		 * released from the users in the notify chain.
 		 */
+		cpup = (int *)arg;
 		list_for_each_entry_safe(dev, tmp, &clockevents_released, list)
-			list_del(&dev->list);
+			if (cpumask_test_cpu(*cpup, dev->cpumask))
+				list_del(&dev->list);
 		break;
 	default:
 		break;
-- 
1.6.5.2

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