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authorJoe Millenbach <jmillenbach@gmail.com>2013-01-17 22:44:22 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-18 16:15:27 -0800
commit4f73bc4dd3e8563ef4109f293a092820dff66d92 (patch)
tree8ebd5d01abaceb70da1932db1a5e7219630b0fd3 /drivers/net/usb
parenta1bf9584429d61b7096f93ae09325e1ba538e9e8 (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/net/usb')
-rw-r--r--drivers/net/usb/Kconfig4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
index ef976215b64..bd33153261c 100644
--- a/drivers/net/usb/Kconfig
+++ b/drivers/net/usb/Kconfig
@@ -445,7 +445,7 @@ config USB_NET_QMI_WWAN
config USB_HSO
tristate "Option USB High Speed Mobile Devices"
- depends on USB && RFKILL
+ depends on USB && RFKILL && TTY
default n
help
Choose this option if you have an Option HSDPA/HSUPA card.
@@ -493,7 +493,7 @@ config USB_SIERRA_NET
config USB_VL600
tristate "LG VL600 modem dongle"
- depends on USB_NET_CDCETHER
+ depends on USB_NET_CDCETHER && TTY
select USB_ACM
help
Select this if you want to use an LG Electronics 4G/LTE usb modem