[PATCH 08/15] x86: Disable IRQs before doing anything on nmi_shootdown_cpus()

From: Eduardo Habkost
Date: Wed Nov 05 2008 - 15:00:58 EST


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@xxxxxxxxxx>
---
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 23a9d78..407106e 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -577,6 +577,7 @@ 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

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