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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>
53 lines
1.5 KiB
Plaintext
53 lines
1.5 KiB
Plaintext
#
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# USB Class driver configuration
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#
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comment "USB Device Class drivers"
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depends on USB
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config USB_ACM
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tristate "USB Modem (CDC ACM) support"
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depends on USB && TTY
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---help---
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This driver supports USB modems and ISDN adapters which support the
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Communication Device Class Abstract Control Model interface.
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Please read <file:Documentation/usb/acm.txt> for details.
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If your modem only reports "Cls=ff(vend.)" in the descriptors in
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/proc/bus/usb/devices, then your modem will not work with this
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driver.
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To compile this driver as a module, choose M here: the
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module will be called cdc-acm.
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config USB_PRINTER
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tristate "USB Printer support"
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depends on USB
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help
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Say Y here if you want to connect a USB printer to your computer's
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USB port.
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To compile this driver as a module, choose M here: the
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module will be called usblp.
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config USB_WDM
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tristate "USB Wireless Device Management support"
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depends on USB
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---help---
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This driver supports the WMC Device Management functionality
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of cell phones compliant to the CDC WMC specification. You can use
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AT commands over this device.
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To compile this driver as a module, choose M here: the
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module will be called cdc-wdm.
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config USB_TMC
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tristate "USB Test and Measurement Class support"
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depends on USB
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help
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Say Y here if you want to connect a USB device that follows
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the USB.org specification for USB Test and Measurement devices
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to your computer's USB port.
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To compile this driver as a module, choose M here: the
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module will be called usbtmc.
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