mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 12:11:40 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
46 lines
916 B
C
46 lines
916 B
C
/*
|
|
* poweroff.c - sysrq handler to gracefully power down machine.
|
|
*
|
|
* This file is released under the GPL v2
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/sysrq.h>
|
|
#include <linux/init.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
/*
|
|
* When the user hits Sys-Rq o to power down the machine this is the
|
|
* callback we use.
|
|
*/
|
|
|
|
static void do_poweroff(void *dummy)
|
|
{
|
|
if (pm_power_off)
|
|
pm_power_off();
|
|
}
|
|
|
|
static DECLARE_WORK(poweroff_work, do_poweroff, NULL);
|
|
|
|
static void handle_poweroff(int key, struct pt_regs *pt_regs,
|
|
struct tty_struct *tty)
|
|
{
|
|
schedule_work(&poweroff_work);
|
|
}
|
|
|
|
static struct sysrq_key_op sysrq_poweroff_op = {
|
|
.handler = handle_poweroff,
|
|
.help_msg = "powerOff",
|
|
.action_msg = "Power Off",
|
|
.enable_mask = SYSRQ_ENABLE_BOOT,
|
|
};
|
|
|
|
static int pm_sysrq_init(void)
|
|
{
|
|
register_sysrq_key('o', &sysrq_poweroff_op);
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(pm_sysrq_init);
|