linux/drivers/hwtracing/stm/heartbeat.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Simple heartbeat STM source driver
 * Copyright (c) 2016, Intel Corporation.
 *
 * Heartbeat STM source will send repetitive messages over STM devices to a
 * trace host.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/hrtimer.h>
#include <linux/slab.h>
#include <linux/stm.h>

#define STM_HEARTBEAT_MAX …

static int nr_devs = …;
static int interval_ms = …;

module_param(nr_devs, int, 0400);
module_param(interval_ms, int, 0600);

static struct stm_heartbeat { … } stm_heartbeat[STM_HEARTBEAT_MAX];

static const char str[] = …;

static enum hrtimer_restart stm_heartbeat_hrtimer_handler(struct hrtimer *hr)
{ … }

static int stm_heartbeat_link(struct stm_source_data *data)
{ … }

static void stm_heartbeat_unlink(struct stm_source_data *data)
{ … }

static int stm_heartbeat_init(void)
{ … }

static void stm_heartbeat_exit(void)
{ … }

module_init(…) …;
module_exit(stm_heartbeat_exit);

MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;