2 * drivers/power/process.c - Functions for saving/restoring console.
4 * Originally from swsusp.
7 #include <linux/vt_kern.h>
8 #include <linux/kbd_kern.h>
9 #include <linux/console.h>
12 static int new_loglevel = 10;
13 static int orig_loglevel;
14 static int orig_fgconsole, orig_kmsg;
16 int pm_prepare_console(void)
18 orig_loglevel = console_loglevel;
19 console_loglevel = new_loglevel;
21 #ifdef SUSPEND_CONSOLE
22 acquire_console_sem();
24 orig_fgconsole = fg_console;
26 if (vc_allocate(SUSPEND_CONSOLE)) {
27 /* we can't have a free VC for now. Too bad,
28 * we don't want to mess the screen for now. */
29 release_console_sem();
33 set_console(SUSPEND_CONSOLE);
34 release_console_sem();
36 if (vt_waitactive(SUSPEND_CONSOLE)) {
37 pr_debug("Suspend: Can't switch VCs.");
40 orig_kmsg = kmsg_redirect;
41 kmsg_redirect = SUSPEND_CONSOLE;
46 void pm_restore_console(void)
48 console_loglevel = orig_loglevel;
49 #ifdef SUSPEND_CONSOLE
50 acquire_console_sem();
51 set_console(orig_fgconsole);
52 release_console_sem();