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+#
+# Block layer core configuration
+#
+menuconfig BLOCK
+ bool "Enable the block layer" if EXPERT
+ default y
+ help
+ Provide block layer support for the kernel.
+
+ Disable this option to remove the block layer support from the
+ kernel. This may be useful for embedded devices.
+
+ If this option is disabled:
+
+ - block device files will become unusable
+ - some filesystems (such as ext3) will become unavailable.
+
+ Also, SCSI character devices and USB storage will be disabled 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 LBDAF
+ bool "Support for large (2TB+) block devices and files"
+ depends on !64BIT
+ default y
+ help
+ Enable block devices or files of size 2TB and larger.
+
+ This option is required to support the full capacity of large
+ (2TB+) block devices, including RAID, disk, Network Block Device,
+ Logical Volume Manager (LVM) and loopback.
+
+ This option also enables support for single files larger than
+ 2TB.
+
+ The ext4 filesystem requires that this feature be enabled in
+ order to support filesystems that have the huge_file feature
+ enabled. Otherwise, it will refuse to mount in the read-write
+ mode any filesystems that use the huge_file feature, which is
+ enabled by default by mke2fs.ext4.
+
+ The GFS2 filesystem also requires this feature.
+
+ If unsure, say Y.
+
+config BLK_DEV_BSG
+ bool "Block layer SG support v4"
+ default y
+ 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).
+
+ This option is required by recent UDEV versions to properly
+ access device serial numbers, etc.
+
+ If unsure, say Y.
+
+config BLK_DEV_BSGLIB
+ bool "Block layer SG support v4 helper lib"
+ default n
+ select BLK_DEV_BSG
+ help
+ Subsystems will normally enable this if needed. Users will not
+ normally need to manually enable this.
+
+ If unsure, say N.
+
+config BLK_DEV_INTEGRITY
+ bool "Block layer data integrity support"
+ select CRC_T10DIF if BLK_DEV_INTEGRITY
+ ---help---
+ Some storage devices allow extra information to be
+ stored/retrieved to help protect the data. The block layer
+ data integrity option provides hooks which can be used by
+ filesystems to ensure better data integrity.
+
+ Say yes here if you have a storage device that provides the
+ T10/SCSI Data Integrity Field or the T13/ATA External Path
+ Protection. If in doubt, say N.
+
+config BLK_DEV_THROTTLING
+ bool "Block layer bio throttling support"
+ depends on BLK_CGROUP=y
+ default n
+ ---help---
+ Block layer bio throttling support. It can be used to limit
+ the IO rate to a device. IO rate policies are per cgroup and
+ one needs to mount and use blkio cgroup controller for creating
+ cgroups and specifying per device IO rate policies.
+
+ See Documentation/cgroups/blkio-controller.txt for more information.
+
+config BLK_CMDLINE_PARSER
+ bool "Block device command line partition parser"
+ default n
+ ---help---
+ Enabling this option allows you to specify the partition layout from
+ the kernel boot args. This is typically of use for embedded devices
+ which don't otherwise have any standardized method for listing the
+ partitions on a block device.
+
+ See Documentation/block/cmdline-partition.txt for more information.
+
+menu "Partition Types"
+
+source "block/partitions/Kconfig"
+
+endmenu
+
+endif # BLOCK
+
+config BLOCK_COMPAT
+ bool
+ depends on BLOCK && COMPAT
+ default y
+
+source block/Kconfig.iosched