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

[Eduardo Habkost]

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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