blob: 729447aea02f4d9e6b3e1751bc6ae4bc3339e3d9
1 | /* |
2 | * Kernel module for testing static keys. |
3 | * |
4 | * Copyright 2015 Akamai Technologies Inc. All Rights Reserved |
5 | * |
6 | * Authors: |
7 | * Jason Baron <jbaron@akamai.com> |
8 | * |
9 | * This software is licensed under the terms of the GNU General Public |
10 | * License version 2, as published by the Free Software Foundation, and |
11 | * may be copied, distributed, and modified under those terms. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
17 | */ |
18 | |
19 | #include <linux/module.h> |
20 | #include <linux/jump_label.h> |
21 | |
22 | /* old keys */ |
23 | struct static_key base_old_true_key = STATIC_KEY_INIT_TRUE; |
24 | EXPORT_SYMBOL_GPL(base_old_true_key); |
25 | struct static_key base_inv_old_true_key = STATIC_KEY_INIT_TRUE; |
26 | EXPORT_SYMBOL_GPL(base_inv_old_true_key); |
27 | struct static_key base_old_false_key = STATIC_KEY_INIT_FALSE; |
28 | EXPORT_SYMBOL_GPL(base_old_false_key); |
29 | struct static_key base_inv_old_false_key = STATIC_KEY_INIT_FALSE; |
30 | EXPORT_SYMBOL_GPL(base_inv_old_false_key); |
31 | |
32 | /* new keys */ |
33 | DEFINE_STATIC_KEY_TRUE(base_true_key); |
34 | EXPORT_SYMBOL_GPL(base_true_key); |
35 | DEFINE_STATIC_KEY_TRUE(base_inv_true_key); |
36 | EXPORT_SYMBOL_GPL(base_inv_true_key); |
37 | DEFINE_STATIC_KEY_FALSE(base_false_key); |
38 | EXPORT_SYMBOL_GPL(base_false_key); |
39 | DEFINE_STATIC_KEY_FALSE(base_inv_false_key); |
40 | EXPORT_SYMBOL_GPL(base_inv_false_key); |
41 | |
42 | static void invert_key(struct static_key *key) |
43 | { |
44 | if (static_key_enabled(key)) |
45 | static_key_disable(key); |
46 | else |
47 | static_key_enable(key); |
48 | } |
49 | |
50 | static int __init test_static_key_base_init(void) |
51 | { |
52 | invert_key(&base_inv_old_true_key); |
53 | invert_key(&base_inv_old_false_key); |
54 | invert_key(&base_inv_true_key.key); |
55 | invert_key(&base_inv_false_key.key); |
56 | |
57 | return 0; |
58 | } |
59 | |
60 | static void __exit test_static_key_base_exit(void) |
61 | { |
62 | } |
63 | |
64 | module_init(test_static_key_base_init); |
65 | module_exit(test_static_key_base_exit); |
66 | |
67 | MODULE_AUTHOR("Jason Baron <jbaron@akamai.com>"); |
68 | MODULE_LICENSE("GPL"); |
69 |