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 "kern_util.h"
  10 #include "os.h"
  11 #include "skas.h"
  12
  13 void (*pm_power_off)(void);
  14
  15 static void kill_off_processes(void)
  16 {
  17         if (proc_mm)
  18                 /*
  19                  * FIXME: need to loop over userspace_pids
  20                  */
  21                 os_kill_ptraced_process(userspace_pid[0], 1);
  22         else {
  23                 struct task_struct *p;
  24                 int pid;
  25
  26                 read_lock(&tasklist_lock);
  27                 for_each_process(p) {
  28                         task_lock(p);
  29                         if (!p->mm) {
  30                                 task_unlock(p);
  31                                 continue;
  32                         }
  33                         pid = p->mm->context.id.u.pid;
  34                         task_unlock(p);
  35                         os_kill_ptraced_process(pid, 1);
  36                 }
  37                 read_unlock(&tasklist_lock);
  38         }
  39 }
  40
  41 void uml_cleanup(void)
  42 {
  43         kmalloc_ok = 0;
  44         do_uml_exitcalls();
  45         kill_off_processes();
  46 }
  47
  48 void machine_restart(char * __unused)
  49 {
  50         uml_cleanup();
  51         reboot_skas();
  52 }
  53
  54 void machine_power_off(void)
  55 {
  56         uml_cleanup();
  57         halt_skas();
  58 }
  59
  60 void machine_halt(void)
  61 {
  62         machine_power_off();
  63 }