f77710c4cd
The change adds noop watchdog pretimeout governor, only an informational message is printed to the kernel log buffer when a watchdog triggers a pretimeout event. While introducing the first pretimeout governor the selected design assumes that the default pretimeout governor is selected by its name and it is always built-in, thus the default pretimeout governor can not be unregistered and the correspondent check can be removed from the watchdog_unregister_governor() function. Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
/*
|
|
* Copyright (C) 2015-2016 Mentor Graphics
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/printk.h>
|
|
#include <linux/watchdog.h>
|
|
|
|
#include "watchdog_pretimeout.h"
|
|
|
|
/**
|
|
* pretimeout_noop - No operation on watchdog pretimeout event
|
|
* @wdd - watchdog_device
|
|
*
|
|
* This function prints a message about pretimeout to kernel log.
|
|
*/
|
|
static void pretimeout_noop(struct watchdog_device *wdd)
|
|
{
|
|
pr_alert("watchdog%d: pretimeout event\n", wdd->id);
|
|
}
|
|
|
|
static struct watchdog_governor watchdog_gov_noop = {
|
|
.name = "noop",
|
|
.pretimeout = pretimeout_noop,
|
|
};
|
|
|
|
static int __init watchdog_gov_noop_register(void)
|
|
{
|
|
return watchdog_register_governor(&watchdog_gov_noop);
|
|
}
|
|
|
|
static void __exit watchdog_gov_noop_unregister(void)
|
|
{
|
|
watchdog_unregister_governor(&watchdog_gov_noop);
|
|
}
|
|
module_init(watchdog_gov_noop_register);
|
|
module_exit(watchdog_gov_noop_unregister);
|
|
|
|
MODULE_AUTHOR("Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>");
|
|
MODULE_DESCRIPTION("Panic watchdog pretimeout governor");
|
|
MODULE_LICENSE("GPL");
|