tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
11static int sleep_secs;
12module_param(sleep_secs, int, 0644);
13MODULE_PARM_DESC(sleep_secs, "sleep_secs (default=0)");
14
15static void busymod_work_func(struct work_struct *work);
16static DECLARE_DELAYED_WORK(work, busymod_work_func);
17
18static 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
25static 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
33static void test_klp_callbacks_busy_exit(void)
34{
35 cancel_delayed_work_sync(&work);
36 pr_info("%s\n", __func__);
37}
38
39module_init(test_klp_callbacks_busy_init);
40module_exit(test_klp_callbacks_busy_exit);
41MODULE_LICENSE("GPL");
42MODULE_AUTHOR("Joe Lawrence <joe.lawrence@redhat.com>");
43MODULE_DESCRIPTION("Livepatch test: busy target module");