Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (34 commits)
dm table: set flush capability based on underlying devices
dm crypt: optionally support discard requests
dm raid: add md raid1 support
dm raid: support metadata devices
dm raid: add write_mostly parameter
dm raid: add region_size parameter
dm raid: improve table parameters documentation
dm ioctl: forbid multiple device specifiers
dm ioctl: introduce __get_dev_cell
dm ioctl: fill in device parameters in more ioctls
dm flakey: add corrupt_bio_byte feature
dm flakey: add drop_writes
dm flakey: support feature args
dm flakey: use dm_target_offset and support discards
dm table: share target argument parsing functions
dm snapshot: skip reading origin when overwriting complete chunk
dm: ignore merge_bvec for snapshots when safe
dm table: clean dm_get_device and move exports
dm raid: tidy includes
dm ioctl: prevent empty message
...