um/kernel/reboot.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
0004  */
0005
0006 #include <linux/sched/signal.h>
0007 #include <linux/sched/task.h>
0008 #include <linux/sched/mm.h>
0009 #include <linux/spinlock.h>
0010 #include <linux/slab.h>
0011 #include <linux/oom.h>
0012 #include <kern_util.h>
0013 #include <os.h>
0014 #include <skas.h>
0015
0016 void (*pm_power_off)(void);
0017 EXPORT_SYMBOL(pm_power_off);
0018
0019 static void kill_off_processes(void)
0020 {
0021     struct task_struct *p;
0022     int pid;
0023
0024     read_lock(&tasklist_lock);
0025     for_each_process(p) {
0026         struct task_struct *t;
0027
0028         t = find_lock_task_mm(p);
0029         if (!t)
0030             continue;
0031         pid = t->mm->context.id.u.pid;
0032         task_unlock(t);
0033         os_kill_ptraced_process(pid, 1);
0034     }
0035     read_unlock(&tasklist_lock);
0036 }
0037
0038 void uml_cleanup(void)
0039 {
0040     kmalloc_ok = 0;
0041     do_uml_exitcalls();
0042     kill_off_processes();
0043 }
0044
0045 void machine_restart(char * __unused)
0046 {
0047     uml_cleanup();
0048     reboot_skas();
0049 }
0050
0051 void machine_power_off(void)
0052 {
0053     uml_cleanup();
0054     halt_skas();
0055 }
0056
0057 void machine_halt(void)
0058 {
0059     machine_power_off();
0060 }