drivers/watchdog/pretimeout_noop.c

   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  */
  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
  28 static int __init watchdog_gov_noop_register(void)
  29 {
  30         return watchdog_register_governor(&watchdog_gov_noop);
  31 }
  32
  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");