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: (36 commits)
dm: set queue ordered mode
dm: move wait queue declaration
dm: merge pushback and deferred bio lists
dm: allow uninterruptible wait for pending io
dm: merge __flush_deferred_io into caller
dm: move bio_io_error into __split_and_process_bio
dm: rename __split_bio
dm: remove unnecessary struct dm_wq_req
dm: remove unnecessary work queue context field
dm: remove unnecessary work queue type field
dm: bio list add bio_list_add_head
dm snapshot: persistent fix dtr cleanup
dm snapshot: move status to exception store
dm snapshot: move ctr parsing to exception store
dm snapshot: use DMEMIT macro for status
dm snapshot: remove dm_snap header
dm snapshot: remove dm_snap header use
dm exception store: move cow pointer
dm exception store: move chunk_fields
dm exception store: move dm_target pointer
...