linux-kernel - [PATCH 2/2] run sysrq poweroff on boot cpu

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Message-Id: <1215071814.3214.1.camel@rzhang-dt.sh.intel.com>
Date:	Thu, 03 Jul 2008 15:56:54 +0800
From:	Zhang Rui <rui.zhang@...el.com>
To:	linux-pm <linux-pm@...ts.linux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, harbour@...nx.od.ua
Subject: [PATCH 2/2] run sysrq poweroff on boot cpu

From: Zhang Rui <rui.zhang@...el.com>

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>
---
 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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