linux/drivers/leds/trigger/ledtrig-panic.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Kernel Panic LED Trigger
 *
 * Copyright 2016 Ezequiel Garcia <[email protected]>
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/notifier.h>
#include <linux/panic_notifier.h>
#include <linux/leds.h>
#include "../leds.h"

static struct led_trigger *trigger;

/*
 * This is called in a special context by the atomic panic
 * notifier. This means the trigger can be changed without
 * worrying about locking.
 */
static void led_trigger_set_panic(struct led_classdev *led_cdev)
{ … }

static int led_trigger_panic_notifier(struct notifier_block *nb,
				      unsigned long code, void *unused)
{ … }

static struct notifier_block led_trigger_panic_nb = …;

static long led_panic_blink(int state)
{ … }

static int __init ledtrig_panic_init(void)
{ … }
device_initcall(ledtrig_panic_init);