This file contains some assistance for using "make *config".
  
  Use "make help" to list all of the possible configuration targets.
  
  The xconfig ('qconf') and menuconfig ('mconf') programs also
  have embedded help text.  Be sure to check it for navigation,
  search, and other general help text.
  
  ======================================================================
  General
  --------------------------------------------------
  
  New kernel releases often introduce new config symbols.  Often more
  important, new kernel releases may rename config symbols.  When
  this happens, using a previously working .config file and running
  "make oldconfig" won't necessarily produce a working new kernel
  for you, so you may find that you need to see what NEW kernel
  symbols have been introduced.
  
  To see a list of new config symbols when using "make oldconfig", use
  
  	cp user/some/old.config .config
  	make listnewconfig
  
  and the config program will list any new symbols, one per line.
  
  	scripts/diffconfig .config.old .config | less
  
  ______________________________________________________________________
  Environment variables for '*config'
  
  KCONFIG_CONFIG
  --------------------------------------------------
  This environment variable can be used to specify a default kernel config
  file name to override the default name of ".config".
  
  KCONFIG_OVERWRITECONFIG
  --------------------------------------------------
  If you set KCONFIG_OVERWRITECONFIG in the environment, Kconfig will not
  break symlinks when .config is a symlink to somewhere else.
  
  CONFIG_
  --------------------------------------------------
  If you set CONFIG_ in the environment, Kconfig will prefix all symbols
  with its value when saving the configuration, instead of using the default,
  "CONFIG_".
  
  ______________________________________________________________________
  Environment variables for '{allyes/allmod/allno/rand}config'
  
  KCONFIG_ALLCONFIG
  --------------------------------------------------
  (partially based on lkml email from/by Rob Landley, re: miniconfig)
  --------------------------------------------------
  The allyesconfig/allmodconfig/allnoconfig/randconfig variants can also
  use the environment variable KCONFIG_ALLCONFIG as a flag or a filename
  that contains config symbols that the user requires to be set to a
  specific value.  If KCONFIG_ALLCONFIG is used without a filename where
  KCONFIG_ALLCONFIG == "" or KCONFIG_ALLCONFIG == "1", "make *config"
  checks for a file named "all{yes/mod/no/def/random}.config"
  (corresponding to the *config command that was used) for symbol values
  that are to be forced.  If this file is not found, it checks for a
  file named "all.config" to contain forced values.
  
  This enables you to create "miniature" config (miniconfig) or custom
  config files containing just the config symbols that you are interested
  in.  Then the kernel config system generates the full .config file,
  including symbols of your miniconfig file.
  
  This 'KCONFIG_ALLCONFIG' file is a config file which contains
  (usually a subset of all) preset config symbols.  These variable
  settings are still subject to normal dependency checks.
  
  Examples:
  	KCONFIG_ALLCONFIG=custom-notebook.config make allnoconfig
  or
  	KCONFIG_ALLCONFIG=mini.config make allnoconfig
  or
  	make KCONFIG_ALLCONFIG=mini.config allnoconfig
  
  These examples will disable most options (allnoconfig) but enable or
  disable the options that are explicitly listed in the specified
  mini-config files.
  
  ______________________________________________________________________
  Environment variables for 'randconfig'
  
  KCONFIG_SEED
  --------------------------------------------------
  You can set this to the integer value used to seed the RNG, if you want
  to somehow debug the behaviour of the kconfig parser/frontends.
  If not set, the current time will be used.
  
  KCONFIG_PROBABILITY
  --------------------------------------------------
  This variable can be used to skew the probabilities. This variable can
  be unset or empty, or set to three different formats:
  	KCONFIG_PROBABILITY     y:n split           y:m:n split
  	-----------------------------------------------------------------
  	unset or empty          50  : 50            33  : 33  : 34
  	N                        N  : 100-N         N/2 : N/2 : 100-N
      [1] N:M                     N+M : 100-(N+M)      N  :  M  : 100-(N+M)
      [2] N:M:L                    N  : 100-N          M  :  L  : 100-(M+L)
  
  where N, M and L are integers (in base 10) in the range [0,100], and so
  that:
      [1] N+M is in the range [0,100]
      [2] M+L is in the range [0,100]
  
  Examples:
  	KCONFIG_PROBABILITY=10
  		10% of booleans will be set to 'y', 90% to 'n'
  		5% of tristates will be set to 'y', 5% to 'm', 90% to 'n'
  	KCONFIG_PROBABILITY=15:25
  		40% of booleans will be set to 'y', 60% to 'n'
  		15% of tristates will be set to 'y', 25% to 'm', 60% to 'n'
  	KCONFIG_PROBABILITY=10:15:15
  		10% of booleans will be set to 'y', 90% to 'n'
  		15% of tristates will be set to 'y', 15% to 'm', 70% to 'n'
  
  ______________________________________________________________________
  Environment variables for 'silentoldconfig'
  
  KCONFIG_NOSILENTUPDATE
  --------------------------------------------------
  If this variable has a non-blank value, it prevents silent kernel
  config updates (requires explicit updates).
  
  KCONFIG_AUTOCONFIG
  --------------------------------------------------
  This environment variable can be set to specify the path & name of the
  "auto.conf" file.  Its default value is "include/config/auto.conf".
  
  KCONFIG_TRISTATE
  --------------------------------------------------
  This environment variable can be set to specify the path & name of the
  "tristate.conf" file.  Its default value is "include/config/tristate.conf".
  
  KCONFIG_AUTOHEADER
  --------------------------------------------------
  This environment variable can be set to specify the path & name of the
  "autoconf.h" (header) file.
  Its default value is "include/generated/autoconf.h".
  
  
  ======================================================================
  menuconfig
  --------------------------------------------------
  
  SEARCHING for CONFIG symbols
  
  Searching in menuconfig:
  
  	The Search function searches for kernel configuration symbol
  	names, so you have to know something close to what you are
  	looking for.
  
  	Example:
  		/hotplug
  		This lists all config symbols that contain "hotplug",
  		e.g., HOTPLUG_CPU, MEMORY_HOTPLUG.
  
  	For search help, enter / followed TAB-TAB-TAB (to highlight
  	<Help>) and Enter.  This will tell you that you can also use
  	regular expressions (regexes) in the search string, so if you
  	are not interested in MEMORY_HOTPLUG, you could try
  
  		/^hotplug
  
  	When searching, symbols are sorted thus:
  	  - first, exact matches, sorted alphabetically (an exact match
  	    is when the search matches the complete symbol name);
  	  - then, other matches, sorted alphabetically.
  	For example: ^ATH.K matches:
  	    ATH5K ATH9K ATH5K_AHB ATH5K_DEBUG [...] ATH6KL ATH6KL_DEBUG
  	    [...] ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_COMMON [...]
  	of which only ATH5K and ATH9K match exactly and so are sorted
  	first (and in alphabetical order), then come all other symbols,
  	sorted in alphabetical order.
  
  ______________________________________________________________________
  User interface options for 'menuconfig'
  
  MENUCONFIG_COLOR
  --------------------------------------------------
  It is possible to select different color themes using the variable
  MENUCONFIG_COLOR.  To select a theme use:
  
  	make MENUCONFIG_COLOR=<theme> menuconfig
  
  Available themes are:
    mono       => selects colors suitable for monochrome displays
    blackbg    => selects a color scheme with black background
    classic    => theme with blue background. The classic look
    bluetitle  => a LCD friendly version of classic. (default)
  
  MENUCONFIG_MODE
  --------------------------------------------------
  This mode shows all sub-menus in one large tree.
  
  Example:
  	make MENUCONFIG_MODE=single_menu menuconfig
  
  
  ======================================================================
  xconfig
  --------------------------------------------------
  
  Searching in xconfig:
  
  	The Search function searches for kernel configuration symbol
  	names, so you have to know something close to what you are
  	looking for.
  
  	Example:
  		Ctrl-F hotplug
  	or
  		Menu: File, Search, hotplug
  
  	lists all config symbol entries that contain "hotplug" in
  	the symbol name.  In this Search dialog, you may change the
  	config setting for any of the entries that are not grayed out.
  	You can also enter a different search string without having
  	to return to the main menu.
  
  
  ======================================================================
  gconfig
  --------------------------------------------------
  
  Searching in gconfig:
  
  	None (gconfig isn't maintained as well as xconfig or menuconfig);
  	however, gconfig does have a few more viewing choices than
  	xconfig does.
  
  ###