Messages in this thread Patch in this message | | | From | Trevor Bourget <> | Subject | [PATCH] vt: configurable number of console devices | Date | Mon, 27 May 2019 21:31:17 -0700 |
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Having 63 vt devices for embedded systems might be overkill, so provide a configuration MAX_NR_CONSOLES to allow this consumption to be reduced.
Signed-off-by: Trevor Bourget <tgb.kernel@gmail.com> --- drivers/tty/Kconfig | 9 +++++++++ include/uapi/linux/vt.h | 4 ++++ 2 files changed, 13 insertions(+)
diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index 3b1d312bb175..98e21589f4af 100644 --- a/drivers/tty/Kconfig +++ b/drivers/tty/Kconfig @@ -42,6 +42,15 @@ config VT If unsure, say Y, or else you won't be able to do much with your new shiny Linux system :-) +config MAX_NR_CONSOLES + int "Maximum number of consoles to permit" + depends on VT + range 1 63 + default "63" + ---help--- + The maximum number of consoles that can be used. + The default is 63. + config CONSOLE_TRANSLATIONS depends on VT default y diff --git a/include/uapi/linux/vt.h b/include/uapi/linux/vt.h index e9d39c48520a..3567dd239758 100644 --- a/include/uapi/linux/vt.h +++ b/include/uapi/linux/vt.h @@ -8,9 +8,13 @@ * resizing). */ #define MIN_NR_CONSOLES 1 /* must be at least 1 */ +#ifdef CONFIG_MAX_NR_CONSOLES +#define MAX_NR_CONSOLES CONFIG_MAX_NR_CONSOLES +#else #define MAX_NR_CONSOLES 63 /* serial lines start at 64 */ /* Note: the ioctl VT_GETSTATE does not work for consoles 16 and higher (since it returns a short) */ +#endif /* 0x56 is 'V', to avoid collision with termios and kd */ -- 2.22.0.rc1.257.g3120a18244-goog
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