66 	struct klp_ops *ops;  in klp_find_ops()  local
69 	list_for_each_entry(ops, &klp_ops, node) {  in klp_find_ops()
70 		func = list_first_entry(&ops->func_stack, struct klp_func,  in klp_find_ops()
73 			return ops;  in klp_find_ops()
337 	struct klp_ops *ops;  in klp_ftrace_handler()  local
340 	ops = container_of(fops, struct klp_ops, fops);  in klp_ftrace_handler()
343 	func = list_first_or_null_rcu(&ops->func_stack, struct klp_func,  in klp_ftrace_handler()
355 	struct klp_ops *ops;  in klp_disable_func()  local
362 	ops = klp_find_ops(func->old_addr);  in klp_disable_func()
363 	if (WARN_ON(!ops))  in klp_disable_func()
366 	if (list_is_singular(&ops->func_stack)) {  in klp_disable_func()
367 		WARN_ON(unregister_ftrace_function(&ops->fops));  in klp_disable_func()
368 		WARN_ON(ftrace_set_filter_ip(&ops->fops, func->old_addr, 1, 0));  in klp_disable_func()
371 		list_del(&ops->node);  in klp_disable_func()
372 		kfree(ops);  in klp_disable_func()
382 	struct klp_ops *ops;  in klp_enable_func()  local
391 	ops = klp_find_ops(func->old_addr);  in klp_enable_func()
392 	if (!ops) {  in klp_enable_func()
393 		ops = kzalloc(sizeof(*ops), GFP_KERNEL);  in klp_enable_func()
394 		if (!ops)  in klp_enable_func()
397 		ops->fops.func = klp_ftrace_handler;  in klp_enable_func()
398 		ops->fops.flags = FTRACE_OPS_FL_SAVE_REGS |  in klp_enable_func()
402 		list_add(&ops->node, &klp_ops);  in klp_enable_func()
404 		INIT_LIST_HEAD(&ops->func_stack);  in klp_enable_func()
405 		list_add_rcu(&func->stack_node, &ops->func_stack);  in klp_enable_func()
407 		ret = ftrace_set_filter_ip(&ops->fops, func->old_addr, 0, 0);  in klp_enable_func()
414 		ret = register_ftrace_function(&ops->fops);  in klp_enable_func()
418 			ftrace_set_filter_ip(&ops->fops, func->old_addr, 1, 0);  in klp_enable_func()
424 		list_add_rcu(&func->stack_node, &ops->func_stack);  in klp_enable_func()
433 	list_del(&ops->node);  in klp_enable_func()
434 	kfree(ops);  in klp_enable_func()