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/irq.h b/arch/arm/include/asm/irq.h
index 35c21c3..3e0857a 100644
--- a/arch/arm/include/asm/irq.h
+++ b/arch/arm/include/asm/irq.h
@@ -30,6 +30,9 @@
void handle_IRQ(unsigned int, struct pt_regs *);
void init_IRQ(void);
+void arch_trigger_all_cpu_backtrace(void);
+#define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
+
#endif
#endif