save_stack_trace_tsk_reliable() is not the only function providing the
reliable stack traces anymore.  Architecture might define ARCH_STACKWALK
which provides a newer stack walking interface and has
arch_stack_walk_reliable() function.  Update the description accordingly.
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NMiroslav Benes <mbenes@suse.cz>
Acked-by: NJosh Poimboeuf <jpoimboe@redhat.com>
Link: http://lkml.kernel.org/r/20200120154042.9934-1-mbenes@suse.czSigned-off-by: NLinus Torvalds <torvalds@linux-foundation.org>