Add dump_stack function

At least ARM allows us to dump the stack, but we currently
have no prototype for this. Add a dump_stack prototype and
provide a static inline function for architectures without
stack dump support. Also, call dump_stack() in panic() to
provide more information in the case of a panic.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/arm/cpu/interrupts.c b/arch/arm/cpu/interrupts.c
index 3d2077f491..c4f911392a 100644
--- a/arch/arm/cpu/interrupts.c
+++ b/arch/arm/cpu/interrupts.c
@@ -73,6 +73,11 @@ void show_regs (struct pt_regs *regs)
 #endif
 }
 
+void dump_stack(void)
+{
+	unwind_backtrace(NULL);
+}
+
 static void __noreturn do_exception(struct pt_regs *pt_regs)
 {
 	show_regs(pt_regs);