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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>
84 lines
2.4 KiB
Plaintext
84 lines
2.4 KiB
Plaintext
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config HAVE_ARCH_KGDB
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bool
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menuconfig KGDB
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bool "KGDB: kernel debugger"
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depends on HAVE_ARCH_KGDB
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depends on DEBUG_KERNEL && EXPERIMENTAL
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help
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If you say Y here, it will be possible to remotely debug the
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kernel using gdb. It is recommended but not required, that
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you also turn on the kernel config option
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CONFIG_FRAME_POINTER to aid in producing more reliable stack
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backtraces in the external debugger. Documentation of
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kernel debugger is available at http://kgdb.sourceforge.net
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as well as in DocBook form in Documentation/DocBook/. If
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unsure, say N.
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if KGDB
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config KGDB_SERIAL_CONSOLE
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tristate "KGDB: use kgdb over the serial console"
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select CONSOLE_POLL
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select MAGIC_SYSRQ
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depends on TTY
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default y
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help
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Share a serial console with kgdb. Sysrq-g must be used
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to break in initially.
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config KGDB_TESTS
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bool "KGDB: internal test suite"
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default n
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help
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This is a kgdb I/O module specifically designed to test
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kgdb's internal functions. This kgdb I/O module is
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intended to for the development of new kgdb stubs
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as well as regression testing the kgdb internals.
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See the drivers/misc/kgdbts.c for the details about
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the tests. The most basic of this I/O module is to boot
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a kernel boot arguments "kgdbwait kgdbts=V1F100"
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config KGDB_TESTS_ON_BOOT
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bool "KGDB: Run tests on boot"
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depends on KGDB_TESTS
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default n
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help
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Run the kgdb tests on boot up automatically without the need
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to pass in a kernel parameter
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config KGDB_TESTS_BOOT_STRING
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string "KGDB: which internal kgdb tests to run"
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depends on KGDB_TESTS_ON_BOOT
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default "V1F100"
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help
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This is the command string to send the kgdb test suite on
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boot. See the drivers/misc/kgdbts.c for detailed
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information about other strings you could use beyond the
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default of V1F100.
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config KGDB_LOW_LEVEL_TRAP
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bool "KGDB: Allow debugging with traps in notifiers"
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depends on X86 || MIPS
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default n
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help
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This will add an extra call back to kgdb for the breakpoint
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exception handler on which will will allow kgdb to step
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through a notify handler.
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config KGDB_KDB
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bool "KGDB_KDB: include kdb frontend for kgdb"
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default n
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help
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KDB frontend for kernel
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config KDB_KEYBOARD
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bool "KGDB_KDB: keyboard as input device"
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depends on VT && KGDB_KDB
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default n
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help
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KDB can use a PS/2 type keyboard for an input device
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endif # KGDB
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