xref: /openbmc/linux/arch/um/kernel/reboot.c (revision 0edbfea5)
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 }
59