[PATCH] uml: always disable kmalloc during shutdown
[linux-2.6.git] / arch / um / kernel / reboot.c
1 /* 
2  * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
3  * Licensed under the GPL
4  */
5
6 #include "linux/module.h"
7 #include "linux/sched.h"
8 #include "user_util.h"
9 #include "kern_util.h"
10 #include "kern.h"
11 #include "os.h"
12 #include "mode.h"
13 #include "choose-mode.h"
14
15 #ifdef CONFIG_SMP
16 static void kill_idlers(int me)
17 {
18 #ifdef CONFIG_MODE_TT
19         struct task_struct *p;
20         int i;
21
22         for(i = 0; i < sizeof(idle_threads)/sizeof(idle_threads[0]); i++){
23                 p = idle_threads[i];
24                 if((p != NULL) && (p->thread.mode.tt.extern_pid != me))
25                         os_kill_process(p->thread.mode.tt.extern_pid, 0);
26         }
27 #endif
28 }
29 #endif
30
31 static void kill_off_processes(void)
32 {
33         CHOOSE_MODE(kill_off_processes_tt(), kill_off_processes_skas());
34 #ifdef CONFIG_SMP
35         kill_idlers(os_getpid());
36 #endif
37 }
38
39 void uml_cleanup(void)
40 {
41         kmalloc_ok = 0;
42         do_uml_exitcalls();
43         kill_off_processes();
44 }
45
46 void machine_restart(char * __unused)
47 {
48         uml_cleanup();
49         CHOOSE_MODE(reboot_tt(), reboot_skas());
50 }
51
52 EXPORT_SYMBOL(machine_restart);
53
54 void machine_power_off(void)
55 {
56         uml_cleanup();
57         CHOOSE_MODE(halt_tt(), halt_skas());
58 }
59
60 EXPORT_SYMBOL(machine_power_off);
61
62 void machine_halt(void)
63 {
64         machine_power_off();
65 }
66
67 EXPORT_SYMBOL(machine_halt);
68
69 /*
70  * Overrides for Emacs so that we follow Linus's tabbing style.
71  * Emacs will notice this stuff at the end of the file and automatically
72  * adjust the settings for this buffer only.  This must remain at the end
73  * of the file.
74  * ---------------------------------------------------------------------------
75  * Local variables:
76  * c-file-style: "linux"
77  * End:
78  */