ARM: smp: implement arch_trigger_all_cpus_backtrace using IPI
Based on a rough patch by frank.rowand@am.sony.com
Since ARM doesn't have an NMI (fiq's are not always available),
send an IPI to all other CPUs (current cpu prints the stack directly)
to capture a backtrace.
Change-Id: I8b163c8cec05d521b433ae133795865e8a33d4e2
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h
index ae29293..7f74b59 100644
--- a/arch/arm/include/asm/smp.h
+++ b/arch/arm/include/asm/smp.h
@@ -93,4 +93,6 @@
extern void arch_send_call_function_single_ipi(int cpu);
extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
+extern void smp_send_all_cpu_backtrace(void);
+
#endif /* ifndef __ASM_ARM_SMP_H */