diff options
| author | Joe Millenbach <jmillenbach@gmail.com> | 2013-01-17 22:44:22 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-18 16:15:27 -0800 |
| commit | 4f73bc4dd3e8563ef4109f293a092820dff66d92 (patch) | |
| tree | 8ebd5d01abaceb70da1932db1a5e7219630b0fd3 /drivers/misc | |
| parent | a1bf9584429d61b7096f93ae09325e1ba538e9e8 (diff) | |
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 <jmillenbach@gmail.com>
Reviewed-by: Jamey Sharp <jamey@minilop.net>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/misc/ti-st/Kconfig | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index b151b7c1bd59..4b2bb939dde1 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -127,7 +127,7 @@ config PHANTOM config INTEL_MID_PTI tristate "Parallel Trace Interface for MIPI P1149.7 cJTAG standard" - depends on PCI + depends on PCI && TTY default n help The PTI (Parallel Trace Interface) driver directs diff --git a/drivers/misc/ti-st/Kconfig b/drivers/misc/ti-st/Kconfig index abb5de1afce3..f34dcc514730 100644 --- a/drivers/misc/ti-st/Kconfig +++ b/drivers/misc/ti-st/Kconfig @@ -5,7 +5,7 @@ menu "Texas Instruments shared transport line discipline" config TI_ST tristate "Shared transport core driver" - depends on NET && GPIOLIB + depends on NET && GPIOLIB && TTY select FW_LOADER help This enables the shared transport core driver for TI |