We cannot use print_stack_trace because the name conflicts
with linux/stacktrace.h.
Reported-by: NRandy Dunlap <rdunlap@infradead.org>
Acked-by: NRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: NRichard Weinberger <richard@nod.at>