1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Kernel module for testing static keys.
4 *
5 * Copyright 2015 Akamai Technologies Inc. All Rights Reserved
6 *
7 * Authors:
8 * Jason Baron <jbaron@akamai.com>
9 */
10
11 #include <linux/module.h>
12 #include <linux/jump_label.h>
13
14 /* old keys */
15 struct static_key base_old_true_key = STATIC_KEY_INIT_TRUE;
16 EXPORT_SYMBOL_GPL(base_old_true_key);
17 struct static_key base_inv_old_true_key = STATIC_KEY_INIT_TRUE;
18 EXPORT_SYMBOL_GPL(base_inv_old_true_key);
19 struct static_key base_old_false_key = STATIC_KEY_INIT_FALSE;
20 EXPORT_SYMBOL_GPL(base_old_false_key);
21 struct static_key base_inv_old_false_key = STATIC_KEY_INIT_FALSE;
22 EXPORT_SYMBOL_GPL(base_inv_old_false_key);
23
24 /* new keys */
25 DEFINE_STATIC_KEY_TRUE(base_true_key);
26 EXPORT_SYMBOL_GPL(base_true_key);
27 DEFINE_STATIC_KEY_TRUE(base_inv_true_key);
28 EXPORT_SYMBOL_GPL(base_inv_true_key);
29 DEFINE_STATIC_KEY_FALSE(base_false_key);
30 EXPORT_SYMBOL_GPL(base_false_key);
31 DEFINE_STATIC_KEY_FALSE(base_inv_false_key);
32 EXPORT_SYMBOL_GPL(base_inv_false_key);
33
34 static void invert_key(struct static_key *key)
35 {
36 if (static_key_enabled(key))
37 static_key_disable(key);
38 else
39 static_key_enable(key);
40 }
41
42 static int __init test_static_key_base_init(void)
43 {
44 invert_key(&base_inv_old_true_key);
45 invert_key(&base_inv_old_false_key);
46 invert_key(&base_inv_true_key.key);
47 invert_key(&base_inv_false_key.key);
48
49 return 0;
50 }
51
52 static void __exit test_static_key_base_exit(void)
53 {
54 }
55
56 module_init(test_static_key_base_init);
57 module_exit(test_static_key_base_exit);
58
59 MODULE_AUTHOR("Jason Baron <jbaron@akamai.com>");
60 MODULE_DESCRIPTION("Kernel module to support testing static keys");
61 MODULE_LICENSE("GPL");
62
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