From 7f1efb5833d522ee15cf41576fbf7c375171cfcc Mon Sep 17 00:00:00 2001 From: Dima Zavin Date: Tue, 18 Oct 2011 16:59:54 -0700 Subject: 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 --- arch/arm/kernel/process.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'arch/arm/kernel/process.c') diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 24e7e5722f1c..5360757e902f 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -63,6 +63,18 @@ static volatile int hlt_counter; #include +#ifdef CONFIG_SMP +void arch_trigger_all_cpu_backtrace(void) +{ + smp_send_all_cpu_backtrace(); +} +#else +void arch_trigger_all_cpu_backtrace(void) +{ + dump_stack(); +} +#endif + void disable_hlt(void) { hlt_counter++; -- cgit v1.2.3