reboot.c

 1// SPDX-License-Identifier: GPL-2.0
 2/* 
 3 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 4 */
 5
 6#include <linux/sched/signal.h>
 7#include <linux/sched/task.h>
 8#include <linux/sched/mm.h>
 9#include <linux/spinlock.h>
10#include <linux/slab.h>
11#include <linux/oom.h>
12#include <linux/reboot.h>
13#include <kern_util.h>
14#include <os.h>
15#include <skas.h>
16
17void (*pm_power_off)(void);
18EXPORT_SYMBOL(pm_power_off);
19
20static void kill_off_processes(void)
21{
22	struct task_struct *p;
23	int pid;
24
25	read_lock(&tasklist_lock);
26	for_each_process(p) {
27		struct task_struct *t;
28
29		t = find_lock_task_mm(p);
30		if (!t)
31			continue;
32		pid = t->mm->context.id.pid;
33		task_unlock(t);
34		os_kill_ptraced_process(pid, 1);
35	}
36	read_unlock(&tasklist_lock);
37}
38
39void uml_cleanup(void)
40{
41	kmalloc_ok = 0;
42	do_uml_exitcalls();
43	kill_off_processes();
44}
45
46void machine_restart(char * __unused)
47{
48	uml_cleanup();
49	reboot_skas();
50}
51
52void machine_power_off(void)
53{
54	uml_cleanup();
55	halt_skas();
56}
57
58void machine_halt(void)
59{
60	machine_power_off();
61}
62
63static int sys_power_off_handler(struct sys_off_data *data)
64{
65	machine_power_off();
66	return 0;
67}
68
69static int register_power_off(void)
70{
71	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
72				 SYS_OFF_PRIO_DEFAULT,
73				 sys_power_off_handler, NULL);
74	return 0;
75}
76__initcall(register_power_off);