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