ia64/linux-2.6.18-xen.hg

view kernel/power/console.c @ 562:66faefe721eb

pvSCSI backend driver

Signed-off-by: Tomonari Horikoshi <t.horikoshi@jp.fujitsu.com>
Signed-off-by: Jun Kamada <kama@jp.fujitsu.com>
author Keir Fraser <keir.fraser@citrix.com>
date Mon Jun 02 09:58:27 2008 +0100 (2008-06-02)
parents 831230e53067
children
line source
1 /*
2 * drivers/power/process.c - Functions for saving/restoring console.
3 *
4 * Originally from swsusp.
5 */
7 #include <linux/vt_kern.h>
8 #include <linux/kbd_kern.h>
9 #include <linux/console.h>
10 #include "power.h"
12 #if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
13 #define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
15 static int orig_fgconsole, orig_kmsg;
17 int pm_prepare_console(void)
18 {
19 acquire_console_sem();
21 orig_fgconsole = fg_console;
23 if (vc_allocate(SUSPEND_CONSOLE)) {
24 /* we can't have a free VC for now. Too bad,
25 * we don't want to mess the screen for now. */
26 release_console_sem();
27 return 1;
28 }
30 set_console(SUSPEND_CONSOLE);
31 release_console_sem();
33 if (vt_waitactive(SUSPEND_CONSOLE)) {
34 pr_debug("Suspend: Can't switch VCs.");
35 return 1;
36 }
37 orig_kmsg = kmsg_redirect;
38 kmsg_redirect = SUSPEND_CONSOLE;
39 return 0;
40 }
42 void pm_restore_console(void)
43 {
44 acquire_console_sem();
45 set_console(orig_fgconsole);
46 release_console_sem();
47 kmsg_redirect = orig_kmsg;
48 return;
49 }
50 #endif