44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 Joe Lawrence <joe.lawrence@redhat.com>
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/workqueue.h>
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#include <linux/delay.h>
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static int sleep_secs;
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module_param(sleep_secs, int, 0644);
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MODULE_PARM_DESC(sleep_secs, "sleep_secs (default=0)");
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static void busymod_work_func(struct work_struct *work);
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static DECLARE_DELAYED_WORK(work, busymod_work_func);
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static void busymod_work_func(struct work_struct *work)
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{
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pr_info("%s, sleeping %d seconds ...\n", __func__, sleep_secs);
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msleep(sleep_secs * 1000);
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pr_info("%s exit\n", __func__);
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}
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static int test_klp_callbacks_busy_init(void)
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{
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pr_info("%s\n", __func__);
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schedule_delayed_work(&work,
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msecs_to_jiffies(1000 * 0));
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return 0;
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}
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static void test_klp_callbacks_busy_exit(void)
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{
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cancel_delayed_work_sync(&work);
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pr_info("%s\n", __func__);
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}
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module_init(test_klp_callbacks_busy_init);
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module_exit(test_klp_callbacks_busy_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Joe Lawrence <joe.lawrence@redhat.com>");
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MODULE_DESCRIPTION("Livepatch test: busy target module");
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