diff options
| author | Joe Millenbach <jmillenbach@gmail.com> | 2013-01-18 10:44:22 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-19 04:15:27 +0400 |
| commit | 4f73bc4dd3e8563ef4109f293a092820dff66d92 (patch) | |
| tree | 8ebd5d01abaceb70da1932db1a5e7219630b0fd3 /drivers/net/hamradio | |
| parent | a1bf9584429d61b7096f93ae09325e1ba538e9e8 (diff) | |
| download | linux-4f73bc4dd3e8563ef4109f293a092820dff66d92.tar.xz | |
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/net/hamradio')
| -rw-r--r-- | drivers/net/hamradio/Kconfig | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/hamradio/Kconfig b/drivers/net/hamradio/Kconfig index 95dbcfdf131d..bf5e59687680 100644 --- a/drivers/net/hamradio/Kconfig +++ b/drivers/net/hamradio/Kconfig @@ -1,6 +1,6 @@ config MKISS tristate "Serial port KISS driver" - depends on AX25 + depends on AX25 && TTY select CRC16 ---help--- KISS is a protocol used for the exchange of data between a computer @@ -18,7 +18,7 @@ config MKISS config 6PACK tristate "Serial port 6PACK driver" - depends on AX25 + depends on AX25 && TTY ---help--- 6pack is a transmission protocol for the data exchange between your PC and your TNC (the Terminal Node Controller acts as a kind of |