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--- a/include/linux/vt.h
+++ b/include/linux/vt.h
@@ -18,8 +18,19 @@ extern int unregister_vt_notifier(struct
* 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) */
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -66,6 +66,18 @@ 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
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