Commit c415b3dc authored by Eduardo Habkost's avatar Eduardo Habkost Committed by Ingo Molnar

x86: disable IRQs before doing anything on nmi_shootdown_cpus()

Impact: make nmi_shootdown_cpus() callable from preemptible context

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: default avatarEduardo Habkost <ehabkost@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent bb8dd270
...@@ -577,6 +577,7 @@ static struct notifier_block crash_nmi_nb = { ...@@ -577,6 +577,7 @@ static struct notifier_block crash_nmi_nb = {
void nmi_shootdown_cpus(nmi_shootdown_cb callback) void nmi_shootdown_cpus(nmi_shootdown_cb callback)
{ {
unsigned long msecs; unsigned long msecs;
local_irq_disable();
/* Make a note of crashing cpu. Will be used in NMI callback.*/ /* Make a note of crashing cpu. Will be used in NMI callback.*/
crashing_cpu = safe_smp_processor_id(); crashing_cpu = safe_smp_processor_id();
......
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