mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
8092f73c51
Based on 1 normalized pattern(s): this file is released under the gpl v2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 3 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204655.103854853@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
46 lines
986 B
C
46 lines
986 B
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);
|