[linux-block.git] / kernel / power / console.c

/*
 * drivers/power/process.c - Functions for saving/restoring console.
 *
 * Originally from swsusp.
 */

#include <linux/vt_kern.h>
#include <linux/kbd_kern.h>
#include <linux/console.h>
#include <linux/module.h>
#include "power.h"

#if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
#define SUSPEND_CONSOLE	(MAX_NR_CONSOLES-1)

static int orig_fgconsole, orig_kmsg;

int pm_prepare_console(void)
{
	orig_fgconsole = vt_move_to_console(SUSPEND_CONSOLE, 1);
	if (orig_fgconsole < 0)
		return 1;

	orig_kmsg = kmsg_redirect;
	kmsg_redirect = SUSPEND_CONSOLE;
	return 0;
}

void pm_restore_console(void)
{
	if (orig_fgconsole >= 0) {
		vt_move_to_console(orig_fgconsole, 0);
		kmsg_redirect = orig_kmsg;
	}
}
#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* drivers/power/process.c - Functions for saving/restoring console.
	3	*
	4	* Originally from swsusp.
	5	*/
	6
	7	#include <linux/vt_kern.h>
	8	#include <linux/kbd_kern.h>
	9	#include <linux/console.h>
b6f448e9	10	#include <linux/module.h>
1da177e4 LT	11	#include "power.h"
1da177e4 LT	12
46cd2f32 RW	13	#if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
	14	#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
	15
1da177e4	16	static int orig_fgconsole, orig_kmsg;
1da177e4 LT	17
	18	int pm_prepare_console(void)
	19	{
8d233558 AC	20	orig_fgconsole = vt_move_to_console(SUSPEND_CONSOLE, 1);
8d233558 AC	21	if (orig_fgconsole < 0)
1da177e4	22	return 1;
1da177e4	23
1da177e4 LT	24	orig_kmsg = kmsg_redirect;
1da177e4 LT	25	kmsg_redirect = SUSPEND_CONSOLE;
1da177e4 LT	26	return 0;
	27	}
	28
	29	void pm_restore_console(void)
	30	{
8d233558 AC	31	if (orig_fgconsole >= 0) {
	32	vt_move_to_console(orig_fgconsole, 0);
	33	kmsg_redirect = orig_kmsg;
b090f9fa	34	}
1da177e4	35	}
f7b8988f	36	#endif