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()
330 	struct klp_ops *ops;  in klp_ftrace_handler()  local
333 	ops = container_of(fops, struct klp_ops, fops);  in klp_ftrace_handler()
336 	func = list_first_or_null_rcu(&ops->func_stack, struct klp_func,  in klp_ftrace_handler()
348 	struct klp_ops *ops;  in klp_disable_func()  local
353 	ops = klp_find_ops(func->old_addr);  in klp_disable_func()
354 	if (WARN_ON(!ops))  in klp_disable_func()
357 	if (list_is_singular(&ops->func_stack)) {  in klp_disable_func()
358 		WARN_ON(unregister_ftrace_function(&ops->fops));  in klp_disable_func()
359 		WARN_ON(ftrace_set_filter_ip(&ops->fops, func->old_addr, 1, 0));  in klp_disable_func()
362 		list_del(&ops->node);  in klp_disable_func()
363 		kfree(ops);  in klp_disable_func()
373 	struct klp_ops *ops;  in klp_enable_func()  local
382 	ops = klp_find_ops(func->old_addr);  in klp_enable_func()
383 	if (!ops) {  in klp_enable_func()
384 		ops = kzalloc(sizeof(*ops), GFP_KERNEL);  in klp_enable_func()
385 		if (!ops)  in klp_enable_func()
388 		ops->fops.func = klp_ftrace_handler;  in klp_enable_func()
389 		ops->fops.flags = FTRACE_OPS_FL_SAVE_REGS |  in klp_enable_func()
393 		list_add(&ops->node, &klp_ops);  in klp_enable_func()
395 		INIT_LIST_HEAD(&ops->func_stack);  in klp_enable_func()
396 		list_add_rcu(&func->stack_node, &ops->func_stack);  in klp_enable_func()
398 		ret = ftrace_set_filter_ip(&ops->fops, func->old_addr, 0, 0);  in klp_enable_func()
405 		ret = register_ftrace_function(&ops->fops);  in klp_enable_func()
409 			ftrace_set_filter_ip(&ops->fops, func->old_addr, 1, 0);  in klp_enable_func()
415 		list_add_rcu(&func->stack_node, &ops->func_stack);  in klp_enable_func()
424 	list_del(&ops->node);  in klp_enable_func()
425 	kfree(ops);  in klp_enable_func()