Paravirt framebuffer: Use only if requested [6/6]

diff -r e1df81251b97 -r fccccf63eb85 linux-2.6-xen-sparse/drivers/xen/console/console.c
@@ -663,6 +663,20 @@ static int __init xencons_init(void)
 	printk("Xen virtual console successfully installed as %s%d\n",
 	       DRV(xencons_driver)->name, xc_num);
 
+        /* Don't need to check about graphical fb for domain 0 */
+        if (is_initial_xendomain())
+	  return 0;
+
+	rc = 0;
+	if (xenbus_scanf(XBT_NIL, "console", "use_graphics", "%d", &rc) < 0)
+		printk(KERN_ERR "Unable to read console/use_graphics\n");
+	if (rc == 0) {
+               /* FIXME: this is ugly */
+	       unregister_console(&kcons_info);
+	       kcons_info.flags |= CON_CONSDEV;
+	       register_console(&kcons_info);
+	}
+
 	return 0;
 }
 

diff -r fccccf63eb85 -r e1f90db3f153 linux-2.6-xen-sparse/arch/i386/kernel/setup-xen.c
@@ -1873,9 +1873,6 @@ void __init setup_arch(char **cmdline_p)
 	} else {
 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
 		conswitchp = &dummy_con;
-#else
-		extern int console_use_vt;
-		console_use_vt = 0;
 #endif
 	}
 }

diff -r fccccf63eb85 -r e1f90db3f153 linux-2.6-xen-sparse/drivers/char/tty_io.c
@@ -132,8 +132,6 @@ LIST_HEAD(tty_drivers);			/* linked list
    vt.c for deeply disgusting hack reasons */
 DECLARE_MUTEX(tty_sem);
 
-int console_use_vt = 1;
-
 #ifdef CONFIG_UNIX98_PTYS
 extern struct tty_driver *ptm_driver;	/* Unix98 pty masters; for /dev/ptmx */
 extern int pty_limit;		/* Config limit on Unix98 ptys */

@@ -2056,7 +2054,7 @@ retry_open:
 		goto got_driver;
 	}
 #ifdef CONFIG_VT
-	if (console_use_vt && (device == MKDEV(TTY_MAJOR,0))) {
+	if (device == MKDEV(TTY_MAJOR,0)) {
 		extern struct tty_driver *console_driver;
 		driver = console_driver;
 		index = fg_console;

@@ -3243,8 +3241,6 @@ static int __init tty_init(void)
 #endif
 
 #ifdef CONFIG_VT
-	if (!console_use_vt)
-		goto out_vt;
 	cdev_init(&vc0_cdev, &console_fops);
 	if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
 	    register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)