| 1 | --- a/include/linux/vt.h |
| 2 | +++ b/include/linux/vt.h |
| 3 | @@ -18,8 +18,19 @@ extern int unregister_vt_notifier(struct |
| 4 | * resizing). |
| 5 | */ |
| 6 | #define MIN_NR_CONSOLES 1 /* must be at least 1 */ |
| 7 | +#if (CONFIG_NR_TTY_DEVICES < 4) |
| 8 | +/* Lower Limit */ |
| 9 | +#define MAX_NR_CONSOLES 4 /* serial lines start at 64 */ |
| 10 | +#define MAX_NR_USER_CONSOLES 4 /* must be root to allocate above this */ |
| 11 | +#elif (CONFIG_NR_TTY_DEVICES > 63) |
| 12 | +/* Upper Limit */ |
| 13 | #define MAX_NR_CONSOLES 63 /* serial lines start at 64 */ |
| 14 | #define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */ |
| 15 | +#else |
| 16 | +/* They chose a sensible number */ |
| 17 | +#define MAX_NR_CONSOLES CONFIG_NR_TTY_DEVICES |
| 18 | +#define MAX_NR_USER_CONSOLES CONFIG_NR_TTY_DEVICES |
| 19 | +#endif |
| 20 | /* Note: the ioctl VT_GETSTATE does not work for |
| 21 | consoles 16 and higher (since it returns a short) */ |
| 22 | |
| 23 | --- a/drivers/char/Kconfig |
| 24 | +++ b/drivers/char/Kconfig |
| 25 | @@ -66,6 +66,18 @@ config VT_CONSOLE |
| 26 | |
| 27 | If unsure, say Y. |
| 28 | |
| 29 | +config NR_TTY_DEVICES |
| 30 | + int "Maximum tty device number" |
| 31 | + depends on VT |
| 32 | + default 63 |
| 33 | + ---help--- |
| 34 | + This is the highest numbered device created in /dev. You will actually have |
| 35 | + NR_TTY_DEVICES+1 devices in /dev. The default is 63, which will result in |
| 36 | + 64 /dev entries. The lowest number you can set is 11, anything below that, |
| 37 | + and it will default to 11. 63 is also the upper limit so we don't overrun |
| 38 | + the serial consoles. |
| 39 | + |
| 40 | + |
| 41 | config HW_CONSOLE |
| 42 | bool |
| 43 | depends on VT && !S390 && !UML |
| 44 | |
