From 4f73bc4dd3e8563ef4109f293a092820dff66d92 Mon Sep 17 00:00:00 2001 From: Joe Millenbach Date: Thu, 17 Jan 2013 22:44:22 -0800 Subject: tty: Added a CONFIG_TTY option to allow removal of TTY The option allows you to remove TTY and compile without errors. This saves space on systems that won't support TTY interfaces anyway. bloat-o-meter output is below. The bulk of this patch consists of Kconfig changes adding "depends on TTY" to various serial devices and similar drivers that require the TTY layer. Ideally, these dependencies would occur on a common intermediate symbol such as SERIO, but most drivers "select SERIO" rather than "depends on SERIO", and "select" does not respect dependencies. bloat-o-meter output comparing our previous minimal to new minimal by removing TTY. The list is filtered to not show removed entries with awk '$3 != "-"' as the list was very long. add/remove: 0/226 grow/shrink: 2/14 up/down: 6/-35356 (-35350) function old new delta chr_dev_init 166 170 +4 allow_signal 80 82 +2 static.__warned 143 142 -1 disallow_signal 63 62 -1 __set_special_pids 95 94 -1 unregister_console 126 121 -5 start_kernel 546 541 -5 register_console 593 588 -5 copy_from_user 45 40 -5 sys_setsid 128 120 -8 sys_vhangup 32 19 -13 do_exit 1543 1526 -17 bitmap_zero 60 40 -20 arch_local_irq_save 137 117 -20 release_task 674 652 -22 static.spin_unlock_irqrestore 308 260 -48 Signed-off-by: Joe Millenbach Reviewed-by: Jamey Sharp Reviewed-by: Josh Triplett Signed-off-by: Greg Kroah-Hartman --- drivers/input/serio/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/input/serio') diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig index 4a4e182c33e7..81ee7551148e 100644 --- a/drivers/input/serio/Kconfig +++ b/drivers/input/serio/Kconfig @@ -4,6 +4,7 @@ config SERIO tristate "Serial I/O support" if EXPERT || !X86 default y + depends on TTY help Say Yes here if you have any input device that uses serial I/O to communicate with the system. This includes the -- cgit v1.2.3 From 238d9f6e551d87bd6fbcfa3069592dfb407937fb Mon Sep 17 00:00:00 2001 From: Joe Millenbach Date: Tue, 5 Feb 2013 17:58:34 -0800 Subject: input: drop unnecessary dependencies on TTY Backing out changes made in earlier TTY removal patch. Switched to only one dependency in SERPORT on TTY instead of many incorrect dependencies. Signed-off-by: Joe Millenbach Reported-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/input/serio/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/input/serio') diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig index 81ee7551148e..fe4e4953d5f5 100644 --- a/drivers/input/serio/Kconfig +++ b/drivers/input/serio/Kconfig @@ -4,7 +4,6 @@ config SERIO tristate "Serial I/O support" if EXPERT || !X86 default y - depends on TTY help Say Yes here if you have any input device that uses serial I/O to communicate with the system. This includes the @@ -37,6 +36,7 @@ config SERIO_I8042 config SERIO_SERPORT tristate "Serial port line discipline" default y + depends on TTY help Say Y here if you plan to use an input device (mouse, joystick, tablet, 6dof) that communicates over the RS232 serial (COM) port. -- cgit v1.2.3