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#
# 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