arch/um/kernel/reboot.c

   1 /*
   2  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include <linux/sched/signal.h>
   7 #include <linux/sched/task.h>
   8 #include <linux/spinlock.h>
   9 #include <linux/slab.h>
  10 #include <linux/oom.h>
  11 #include <kern_util.h>
  12 #include <os.h>
  13 #include <skas.h>
  14
  15 void (*pm_power_off)(void);
  16 EXPORT_SYMBOL(pm_power_off);
  17
  18 static void kill_off_processes(void)
  19 {
  20         struct task_struct *p;
  21         int pid;
  22
  23         read_lock(&tasklist_lock);
  24         for_each_process(p) {
  25                 struct task_struct *t;
  26
  27                 t = find_lock_task_mm(p);
  28                 if (!t)
  29                         continue;
  30                 pid = t->mm->context.id.u.pid;
  31                 task_unlock(t);
  32                 os_kill_ptraced_process(pid, 1);
  33         }
  34         read_unlock(&tasklist_lock);
  35 }
  36
  37 void uml_cleanup(void)
  38 {
  39         kmalloc_ok = 0;
  40         do_uml_exitcalls();
  41         kill_off_processes();
  42 }
  43
  44 void machine_restart(char * __unused)
  45 {
  46         uml_cleanup();
  47         reboot_skas();
  48 }
  49
  50 void machine_power_off(void)
  51 {
  52         uml_cleanup();
  53         halt_skas();
  54 }
  55
  56 void machine_halt(void)
  57 {
  58         machine_power_off();
  59 }