/* * Kernel module for testing static keys. * * Copyright 2015 Akamai Technologies Inc. All Rights Reserved * * Authors: *      Jason Baron       <jbaron@akamai.com> * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. */ #include <linux/module.h>#include <linux/jump_label.h> /* old keys */struct static_key base_old_true_key = STATIC_KEY_INIT_TRUE;EXPORT_SYMBOL_GPL(base_old_true_key);struct static_key base_inv_old_true_key = STATIC_KEY_INIT_TRUE;EXPORT_SYMBOL_GPL(base_inv_old_true_key);struct static_key base_old_false_key = STATIC_KEY_INIT_FALSE;EXPORT_SYMBOL_GPL(base_old_false_key);struct static_key base_inv_old_false_key = STATIC_KEY_INIT_FALSE;EXPORT_SYMBOL_GPL(base_inv_old_false_key); /* new keys */DEFINE_STATIC_KEY_TRUE(base_true_key);EXPORT_SYMBOL_GPL(base_true_key);DEFINE_STATIC_KEY_TRUE(base_inv_true_key);EXPORT_SYMBOL_GPL(base_inv_true_key);DEFINE_STATIC_KEY_FALSE(base_false_key);EXPORT_SYMBOL_GPL(base_false_key);DEFINE_STATIC_KEY_FALSE(base_inv_false_key);EXPORT_SYMBOL_GPL(base_inv_false_key); static void invert_key(struct static_key *key){	if (static_key_enabled(key))		static_key_disable(key);	else		static_key_enable(key);} static int __init test_static_key_base_init(void){	invert_key(&base_inv_old_true_key);	invert_key(&base_inv_old_false_key);	invert_key(&base_inv_true_key.key);	invert_key(&base_inv_false_key.key); 	return 0;} static void __exit test_static_key_base_exit(void){} module_init(test_static_key_base_init);module_exit(test_static_key_base_exit); MODULE_AUTHOR("Jason Baron <jbaron@akamai.com>");MODULE_LICENSE("GPL");