| * poweroff.c - sysrq handler to gracefully power down machine. |
| * This file is released under the GPL v2 |
| #include <linux/kernel.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 |
| static void do_poweroff(struct work_struct *dummy) |
| 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); |
| subsys_initcall(pm_sysrq_init); |