Subversion Repositories test_project

/*

 * 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 "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)

{

        acquire_console_sem();

        orig_fgconsole = fg_console;

        if (vc_allocate(SUSPEND_CONSOLE)) {

          /* we can't have a free VC for now. Too bad,

           * we don't want to mess the screen for now. */

                release_console_sem();

                return 1;

        }

        if (set_console(SUSPEND_CONSOLE)) {

                /*

                 * We're unable to switch to the SUSPEND_CONSOLE.

                 * Let the calling function know so it can decide

                 * what to do.

                 */

                release_console_sem();

                return 1;

        }

        release_console_sem();

        if (vt_waitactive(SUSPEND_CONSOLE)) {

                pr_debug("Suspend: Can't switch VCs.");

                return 1;

        }

        orig_kmsg = kmsg_redirect;

        kmsg_redirect = SUSPEND_CONSOLE;

        return 0;

}

void pm_restore_console(void)

{

        acquire_console_sem();

        set_console(orig_fgconsole);

        release_console_sem();

        kmsg_redirect = orig_kmsg;

        return;

}

#endif