#
  # Block layer core configuration
  #

  menuconfig BLOCK

         bool "Enable the block layer" if EMBEDDED

         default y
         help
  	 This permits the block layer to be removed from the kernel if it's not
  	 needed (on some embedded devices for example).  If this option is
  	 disabled, then blockdev files will become unusable and some
  	 filesystems (such as ext3) will become unavailable.
  
  	 This option will also disable SCSI character devices and USB storage
  	 since they make use of various block layer definitions and
  	 facilities.
  
  	 Say Y here unless you know you really don't want to mount disks and
  	 suchlike.
  
  if BLOCK

  config LBD
  	bool "Support for Large Block Devices"

  	depends on !64BIT

  	help
  	  Say Y here if you want to attach large (bigger than 2TB) discs to
  	  your machine, or if you want to have a raid or loopback device
  	  bigger than 2TB.  Otherwise say N.

  config BLK_DEV_IO_TRACE
  	bool "Support for tracing block io actions"

  	depends on SYSFS

  	select RELAY
  	select DEBUG_FS
  	help
  	  Say Y here, if you want to be able to trace the block layer actions
  	  on a given queue. Tracing allows you to see any traffic happening
  	  on a block device queue. For more information (and the user space
  	  support tools needed), fetch the blktrace app from:
  
  	  git://brick.kernel.dk/data/git/blktrace.git

  config LSF
  	bool "Support for Large Single Files"

  	depends on !64BIT

  	help

  	  Say Y here if you want to be able to handle very large files (bigger
  	  than 2TB), otherwise say N.
  
  	  If unsure, say Y.

  config BLK_DEV_BSG

  	bool "Block layer SG support v4 (EXPERIMENTAL)"

  	depends on EXPERIMENTAL

  	---help---

  	Saying Y here will enable generic SG (SCSI generic) v4 support
  	for any block device.
  
  	Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
  	can handle complicated SCSI commands: tagged variable length cdbs
  	with bidirectional data transfers and generic request/response
  	protocols (e.g. Task Management Functions and SMP in Serial
  	Attached SCSI).

  endif # BLOCK

  config BLOCK_COMPAT
  	bool

  	depends on BLOCK && COMPAT

  	default y

  source block/Kconfig.iosched