linux-kernel - [PATCH -mm 6/8] Schedule sysrq poweroff on boot cpu

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Date:	Thu, 10 Jul 2008 02:04:24 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Pavel Machek <pavel@...e.cz>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Zhang Rui <rui.zhang@...el.com>, Rus <harbour@...nx.od.ua>
Subject: [PATCH -mm 6/8] Schedule sysrq poweroff on boot cpu

From: Zhang Rui <rui.zhang@...el.com>
Subject: Schedule sysrq poweroff on boot cpu

schedule sysrq poweroff on boot cpu.

sysrq poweroff needs to disable nonboot cpus, and we need to run this
on boot cpu to avoid any recursion.
http://bugzilla.kernel.org/show_bug.cgi?id=10897

Signed-off-by: Zhang Rui <rui.zhang@...el.com>
tested-by: Rus <harbour@...nx.od.ua>
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 kernel/power/poweroff.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6/kernel/power/poweroff.c
===================================================================
--- linux-2.6.orig/kernel/power/poweroff.c	2008-06-30 16:01:35.000000000 +0800
+++ linux-2.6/kernel/power/poweroff.c	2008-07-03 10:50:05.000000000 +0800
@@ -25,7 +25,8 @@
 
 static void handle_poweroff(int key, struct tty_struct *tty)
 {
-	schedule_work(&poweroff_work);
+	/* run sysrq poweroff on boot cpu */
+	schedule_work_on(first_cpu(cpu_online_map), &poweroff_work);
 }
 
 static struct sysrq_key_op	sysrq_poweroff_op = {





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