#
  # Block layer core configuration
  #
  #XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64
  #for instance.
  config LBD
  	bool "Support for Large Block Devices"
  	depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML
  	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.
  
  source block/Kconfig.iosched