livepatch: fix uninitialized return value

Fix a potentially uninitialized return value in klp_enable_func().

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

kernel/livepatch/core.c

@@ -410,7 +410,7 @@ static int klp_enable_func(struct klp_func *func)
 
 	func->state = KLP_ENABLED;
 
-	return ret;
+	return 0;
 
 err:
 	list_del_rcu(&func->stack_node);