1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (C) 2015-2016 Mentor Graphics
4  */
5 
6 #include <linux/module.h>
7 #include <linux/printk.h>
8 #include <linux/watchdog.h>
9 
10 #include "watchdog_pretimeout.h"
11 
12 /**
13  * pretimeout_noop - No operation on watchdog pretimeout event
14  * @wdd - watchdog_device
15  *
16  * This function prints a message about pretimeout to kernel log.
17  */
pretimeout_noop(struct watchdog_device * wdd)18 static void pretimeout_noop(struct watchdog_device *wdd)
19 {
20 	pr_alert("watchdog%d: pretimeout event\n", wdd->id);
21 }
22 
23 static struct watchdog_governor watchdog_gov_noop = {
24 	.name		= "noop",
25 	.pretimeout	= pretimeout_noop,
26 };
27 
watchdog_gov_noop_register(void)28 static int __init watchdog_gov_noop_register(void)
29 {
30 	return watchdog_register_governor(&watchdog_gov_noop);
31 }
32 
watchdog_gov_noop_unregister(void)33 static void __exit watchdog_gov_noop_unregister(void)
34 {
35 	watchdog_unregister_governor(&watchdog_gov_noop);
36 }
37 module_init(watchdog_gov_noop_register);
38 module_exit(watchdog_gov_noop_unregister);
39 
40 MODULE_AUTHOR("Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>");
41 MODULE_DESCRIPTION("Panic watchdog pretimeout governor");
42 MODULE_LICENSE("GPL");
43