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-rw-r--r--arch/arm/kernel/smp.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 7c467c5b048e..b26361355dae 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -749,6 +749,15 @@ core_initcall(register_cpufreq_notifier);
static void raise_nmi(cpumask_t *mask)
{
+ /*
+ * Generate the backtrace directly if we are running in a calling
+ * context that is not preemptible by the backtrace IPI. Note
+ * that nmi_cpu_backtrace() automatically removes the current cpu
+ * from mask.
+ */
+ if (cpumask_test_cpu(smp_processor_id(), mask) && irqs_disabled())
+ nmi_cpu_backtrace(NULL);
+
smp_cross_call(mask, IPI_CPU_BACKTRACE);
}