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a2818ee4 JL |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Copyright (C) 2018 Joe Lawrence <joe.lawrence@redhat.com> | |
3 | ||
4 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/kernel.h> | |
8 | #include <linux/workqueue.h> | |
9 | #include <linux/delay.h> | |
10 | ||
11 | static int sleep_secs; | |
12 | module_param(sleep_secs, int, 0644); | |
13 | MODULE_PARM_DESC(sleep_secs, "sleep_secs (default=0)"); | |
14 | ||
15 | static void busymod_work_func(struct work_struct *work); | |
16 | static DECLARE_DELAYED_WORK(work, busymod_work_func); | |
17 | ||
18 | static void busymod_work_func(struct work_struct *work) | |
19 | { | |
20 | pr_info("%s, sleeping %d seconds ...\n", __func__, sleep_secs); | |
21 | msleep(sleep_secs * 1000); | |
22 | pr_info("%s exit\n", __func__); | |
23 | } | |
24 | ||
25 | static int test_klp_callbacks_busy_init(void) | |
26 | { | |
27 | pr_info("%s\n", __func__); | |
28 | schedule_delayed_work(&work, | |
29 | msecs_to_jiffies(1000 * 0)); | |
30 | return 0; | |
31 | } | |
32 | ||
33 | static void test_klp_callbacks_busy_exit(void) | |
34 | { | |
35 | cancel_delayed_work_sync(&work); | |
36 | pr_info("%s\n", __func__); | |
37 | } | |
38 | ||
39 | module_init(test_klp_callbacks_busy_init); | |
40 | module_exit(test_klp_callbacks_busy_exit); | |
41 | MODULE_LICENSE("GPL"); | |
42 | MODULE_AUTHOR("Joe Lawrence <joe.lawrence@redhat.com>"); | |
43 | MODULE_DESCRIPTION("Livepatch test: busy target module"); |