sh: kprobes: Default to NOTIFY_DONE for unhandled debug traps.

Presently this is doing a force_sig() SIGTRAP, which is already taken
care of in the generic code if no one asserts NOTIFY_STOP. Switch the
default return to NOTIFY_DONE in the case of unhandled traps, so that
the same trap may pass through to other users on the same die chain.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/kernel/kprobes.c

@@ -474,7 +474,7 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
 				ret = NOTIFY_STOP;
 			} else {
 				/* Not a kprobe trap */
-				force_sig(SIGTRAP, current);
+				ret = NOTIFY_DONE;
 			}
 		} else {
 			p = get_kprobe(addr);