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
  16 static void kill_off_processes(void)
  17 {
  18         if (proc_mm)
  19                 /*
  20                  * FIXME: need to loop over userspace_pids
  21                  */
  22                 os_kill_ptraced_process(userspace_pid[0], 1);
  23         else {
  24                 struct task_struct *p;
  25                 int pid;
  26
  27                 read_lock(&tasklist_lock);
  28                 for_each_process(p) {
  29                         struct task_struct *t;
  30
  31                         t = find_lock_task_mm(p);
  32                         if (!t)
  33                                 continue;
  34                         pid = t->mm->context.id.u.pid;
  35                         task_unlock(t);
  36                         os_kill_ptraced_process(pid, 1);
  37                 }
  38                 read_unlock(&tasklist_lock);
  39         }
  40 }
  41
  42 void uml_cleanup(void)
  43 {
  44         kmalloc_ok = 0;
  45         do_uml_exitcalls();
  46         kill_off_processes();
  47 }
  48
  49 void machine_restart(char * __unused)
  50 {
  51         uml_cleanup();
  52         reboot_skas();
  53 }
  54
  55 void machine_power_off(void)
  56 {
  57         uml_cleanup();
  58         halt_skas();
  59 }
  60
  61 void machine_halt(void)
  62 {
  63         machine_power_off();
  64 }