[PATCH 8/8] x86: Disable IRQs before doing anything on nmi_shootdown_cpus()

Eduardo Habkost
2008-11-12T13:34:44Z

We need to know on which CPU we are running on, and we don't want to be
preempted while doing this.

Signed-off-by: Eduardo Habkost <ehabkost-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
arch/x86/kernel/reboot.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index d0c9c77..c495687 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -582,6 +582,7 @@ static struct notifier_block crash_nmi_nb = {
void nmi_shootdown_cpus(nmi_shootdown_cb callback)
{
unsigned long msecs;
+ local_irq_disable();

/* Make a note of crashing cpu. Will be used in NMI callback.*/
crashing_cpu = safe_smp_processor_id();
--
1.5.5.GIT