diff options
Diffstat (limited to 'lib/test_jump_label_base.c')
| -rw-r--r-- | lib/test_jump_label_base.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/test_jump_label_base.c b/lib/test_jump_label_base.c new file mode 100644 index 000000000000..91aed8e8a7e8 --- /dev/null +++ b/lib/test_jump_label_base.c @@ -0,0 +1,68 @@ +/* + * Kernel module for testing jump labels. + * + * 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_jump_label_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_jump_label_base_exit(void) +{ +} + +module_init(test_jump_label_base_init); +module_exit(test_jump_label_base_exit); + +MODULE_AUTHOR("Jason Baron <jbaron@akamai.com>"); +MODULE_LICENSE("GPL"); |