drivers/watchdog/pretimeout_noop.c

   1 /*
   2  * Copyright (C) 2015-2016 Mentor Graphics
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/printk.h>
  13 #include <linux/watchdog.h>
  14
  15 #include "watchdog_pretimeout.h"
  16
  17 /**
  18  * pretimeout_noop - No operation on watchdog pretimeout event
  19  * @wdd - watchdog_device
  20  *
  21  * This function prints a message about pretimeout to kernel log.
  22  */
  23 static void pretimeout_noop(struct watchdog_device *wdd)
  24 {
  25         pr_alert("watchdog%d: pretimeout event\n", wdd->id);
  26 }
  27
  28 static struct watchdog_governor watchdog_gov_noop = {
  29         .name           = "noop",
  30         .pretimeout     = pretimeout_noop,
  31 };
  32
  33 static int __init watchdog_gov_noop_register(void)
  34 {
  35         return watchdog_register_governor(&watchdog_gov_noop);
  36 }
  37
  38 static void __exit watchdog_gov_noop_unregister(void)
  39 {
  40         watchdog_unregister_governor(&watchdog_gov_noop);
  41 }
  42 module_init(watchdog_gov_noop_register);
  43 module_exit(watchdog_gov_noop_unregister);
  44
  45 MODULE_AUTHOR("Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>");
  46 MODULE_DESCRIPTION("Panic watchdog pretimeout governor");
  47 MODULE_LICENSE("GPL");