openwrtv4/target/linux/s3c24xx/patches-2.6.24/1044-config-nr-tty-devices.patch.patch

From 29296aa9ec0140894c77b076806217fd19c0ce9d Mon Sep 17 00:00:00 2001
From: mokopatches <mokopatches@openmoko.org>
Date: Sun, 13 Apr 2008 07:23:47 +0100
Subject: [PATCH] config-nr-tty-devices.patch

---
 drivers/char/Kconfig |   12 ++++++++++++
 include/linux/vt.h   |   11 +++++++++++
 2 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 2e3a0d4..ed913da 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -58,6 +58,18 @@ config VT_CONSOLE
 
 	  If unsure, say Y.
 
+config NR_TTY_DEVICES
+	int "Maximum tty device number"
+	depends on VT
+	default 63
+	---help---
+	  This is the highest numbered device created in /dev. You will actually have
+	  NR_TTY_DEVICES+1 devices in /dev. The default is 63, which will result in
+	  64 /dev entries. The lowest number you can set is 11, anything below that, 
+	  and it will default to 11. 63 is also the upper limit so we don't overrun
+	  the serial consoles.
+
+
 config HW_CONSOLE
 	bool
 	depends on VT && !S390 && !UML
diff --git a/include/linux/vt.h b/include/linux/vt.h
index 02c1c02..2ba4d21 100644
--- a/include/linux/vt.h
+++ b/include/linux/vt.h
@@ -18,8 +18,19 @@ extern int unregister_vt_notifier(struct notifier_block *nb);
  * resizing).
  */
 #define MIN_NR_CONSOLES 1       /* must be at least 1 */
+#if (CONFIG_NR_TTY_DEVICES < 4)
+/* Lower Limit */
+#define MAX_NR_CONSOLES	4	/* serial lines start at 64 */
+#define MAX_NR_USER_CONSOLES 4	/* must be root to allocate above this */
+#elif (CONFIG_NR_TTY_DEVICES > 63)
+/* Upper Limit */
 #define MAX_NR_CONSOLES	63	/* serial lines start at 64 */
 #define MAX_NR_USER_CONSOLES 63	/* must be root to allocate above this */
+#else
+/* They chose a sensible number */
+#define MAX_NR_CONSOLES CONFIG_NR_TTY_DEVICES
+#define MAX_NR_USER_CONSOLES CONFIG_NR_TTY_DEVICES
+#endif
 		/* Note: the ioctl VT_GETSTATE does not work for
 		   consoles 16 and higher (since it returns a short) */
 
-- 
1.5.6.5