[linux.git] / kernel / power / poweroff.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * poweroff.c - sysrq handler to gracefully power down machine.
 */

#include <linux/kernel.h>
#include <linux/sysrq.h>
#include <linux/init.h>
#include <linux/pm.h>
#include <linux/workqueue.h>
#include <linux/reboot.h>
#include <linux/cpumask.h>

/*
 * When the user hits Sys-Rq o to power down the machine this is the
 * callback we use.
 */

static void do_poweroff(struct work_struct *dummy)
{
	kernel_power_off();
}

static DECLARE_WORK(poweroff_work, do_poweroff);

static void handle_poweroff(int key)
{
	/* run sysrq poweroff on boot cpu */
	schedule_work_on(cpumask_first(cpu_online_mask), &poweroff_work);
}

static struct sysrq_key_op	sysrq_poweroff_op = {
	.handler        = handle_poweroff,
	.help_msg       = "poweroff(o)",
	.action_msg     = "Power Off",
	.enable_mask	= SYSRQ_ENABLE_BOOT,
};

static int __init pm_sysrq_init(void)
{
	register_sysrq_key('o', &sysrq_poweroff_op);
	return 0;
}

subsys_initcall(pm_sysrq_init);
Commit	Line	Data
8092f73c	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/*
1da177e4 LT	3	* poweroff.c - sysrq handler to gracefully power down machine.
1da177e4 LT	4	*/
	5
	6	#include <linux/kernel.h>
	7	#include <linux/sysrq.h>
	8	#include <linux/init.h>
	9	#include <linux/pm.h>
	10	#include <linux/workqueue.h>
ff319777	11	#include <linux/reboot.h>
2f15fc4b	12	#include <linux/cpumask.h>
1da177e4 LT	13
	14	/*
	15	* When the user hits Sys-Rq o to power down the machine this is the
	16	* callback we use.
	17	*/
	18
65f27f38	19	static void do_poweroff(struct work_struct *dummy)
1da177e4	20	{
ff319777	21	kernel_power_off();
1da177e4 LT	22	}
1da177e4 LT	23
65f27f38	24	static DECLARE_WORK(poweroff_work, do_poweroff);
1da177e4	25
1495cc9d	26	static void handle_poweroff(int key)
1da177e4	27	{
2f15fc4b	28	/* run sysrq poweroff on boot cpu */
41c7bb95	29	schedule_work_on(cpumask_first(cpu_online_mask), &poweroff_work);
1da177e4 LT	30	}
	31
	32	static struct sysrq_key_op sysrq_poweroff_op = {
	33	.handler = handle_poweroff,
28ad585e	34	.help_msg = "poweroff(o)",
1da177e4	35	.action_msg = "Power Off",
1dc492a0	36	.enable_mask = SYSRQ_ENABLE_BOOT,
1da177e4 LT	37	};
1da177e4 LT	38
bbdc18a3	39	static int __init pm_sysrq_init(void)
1da177e4 LT	40	{
	41	register_sysrq_key('o', &sysrq_poweroff_op);
	42	return 0;
	43	}
	44
	45	subsys_initcall(pm_sysrq_init);