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| author | Eduardo Habkost <ehabkost@redhat.com> | 2008-11-12 11:34:44 -0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-12 18:55:49 +0100 |
| commit | c415b3dce30dfb41234e118662e8720f47343a4f (patch) | |
| tree | 0bca0f5e8356c96c3f4de5898023a3ef0636057a | |
| parent | bb8dd270e62217e2d2172094c6c352c4ddc0a127 (diff) | |
| download | blackbird-op-linux-c415b3dce30dfb41234e118662e8720f47343a4f.tar.gz blackbird-op-linux-c415b3dce30dfb41234e118662e8720f47343a4f.zip | |
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: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | 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 17a41e055565..c3cd512484e5 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(); |
