Subject: add console_use_vt
From: kraxel@suse.de
Patch-mainline: no

$subject says all

---
 drivers/char/tty_io.c   |    7 ++++++-
 include/linux/console.h |    1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -135,6 +135,8 @@ LIST_HEAD(tty_drivers);			/* linked list
 DEFINE_MUTEX(tty_mutex);
 EXPORT_SYMBOL(tty_mutex);
 
+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 */
@@ -2633,7 +2635,7 @@ retry_open:
 		goto got_driver;
 	}
 #ifdef CONFIG_VT
-	if (device == MKDEV(TTY_MAJOR, 0)) {
+	if (console_use_vt && device == MKDEV(TTY_MAJOR, 0)) {
 		extern struct tty_driver *console_driver;
 		driver = console_driver;
 		index = fg_console;
@@ -4114,6 +4116,8 @@ 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)
@@ -4121,6 +4125,7 @@ static int __init tty_init(void)
 	device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), "tty0");
 
 	vty_init();
+ out_vt:
 #endif
 	return 0;
 }
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -63,6 +63,7 @@ extern const struct consw dummy_con;	/* 
 extern const struct consw vga_con;	/* VGA text console */
 extern const struct consw newport_con;	/* SGI Newport console  */
 extern const struct consw prom_con;	/* SPARC PROM console */
+extern int console_use_vt;
 
 int con_is_bound(const struct consw *csw);
 int register_con_driver(const struct consw *csw, int first, int last);