[GIT PULL] Block driver changes for 3.20

[Jens Axboe <axboe@fb.com>]

Hi Linus,

This is the pull request for block drivers for 3.20. This branch sits on
top of (an earlier) for-3.20/core. It contains:

- The 4k/partition fixes for brd from Boaz/Matthew.

- A few xen front/back block fixes from David Vrabel and Roger Pau
  Monne.

- Floppy changes from Takashi, cleaning the device file creation.

- Switching libata to use the new blk-mq tagging policy, removing code
  (and a suboptimal implementation) from libata. This will throw you a
  merge conflict, since a bug in the original libata tagging code was
  fixed since this code was branched. Trivial. From Shaohua.

- Conversion of loop to blk-mq, from Ming Lei.

- Cleanup of the io_schedule() handling in bsg from Peter Zijlstra. He
  claims it improves on unreadable code, which will cost him a beer.

- Maintainer update or NDB, now handled by Markus Pargmann.

- NVMe:
        - Optimization from me that avoids a kmalloc/kfree per IO for
          smaller (<= 8KB) IO. This cuts about 1% of high IOPS CPU
          overhead.
        - Removal of (now) dead RCU code, a relic from before NVMe was
          converted to blk-mq.

Please pull!

  git://git.kernel.dk/linux-block.git for-3.20/drivers

----------------------------------------------------------------
Boaz Harrosh (2):
      brd: Fix all partitions BUGs
      brd: Request from fdisk 4k alignment

David Vrabel (1):
      xen-blkback: default to X86_32 ABI on x86

Jens Axboe (5):
      loop: add blk-mq.h include
      Merge branch 'for-3.20/core' into for-3.20/drivers
      null_blk: suppress invalid partition info
      Merge branch 'for-3.20/core' into for-3.20/drivers
      NVMe: avoid kmalloc/kfree for smaller IO

Markus Pargmann (1):
      MAINTAINERS: Update NBD maintainer

Matthew Wilcox (1):
      axonram: Fix bug in direct_access

Ming Lei (4):
      block: loop: improve performance via blk-mq
      block: loop: say goodby to bio
      block: loop: introduce lo_discard() and lo_req_flush()
      block: loop: don't handle REQ_FUA explicitly

Peter Zijlstra (1):
      block: Simplify bsg complete all

Roger Pau Monne (2):
      xen-blkback,xen-blkfront: add myself as maintainer
      xen-blkfront: fix accounting of reqs when migrating

Shaohua Li (3):
      libata: use blk taging
      libata: move sas ata tag allocation to libata-scsi.c
      libata: make sata_sil24 use fifo tag allocator

Takashi Iwai (1):
      floppy: Avoid manual call of device_create_file()

kaoudis (1):
      NVMe: within nvme_free_queues(), delete RCU sychro/deferred free

 MAINTAINERS                        |   4 +-
 arch/powerpc/sysdev/axonram.c      |   2 +-
 block/bsg.c                        |  72 +++----
 drivers/ata/libata-core.c          |  67 ++----
 drivers/ata/libata-scsi.c          |  30 ++-
 drivers/ata/libata.h               |   4 +-
 drivers/ata/sata_sil24.c           |   1 +
 drivers/block/brd.c                | 109 +++++-----
 drivers/block/floppy.c             |  17 +-
 drivers/block/loop.c               | 416 ++++++++++++++++++-------------------
 drivers/block/loop.h               |  18 +-
 drivers/block/null_blk.c           |   2 +-
 drivers/block/nvme-core.c          | 128 ++++++++----
 drivers/block/xen-blkback/common.h |   9 +
 drivers/block/xen-blkback/xenbus.c |   4 +-
 drivers/block/xen-blkfront.c       |   4 +-
 include/linux/libata.h             |   5 +-
 include/linux/nvme.h               |   3 +-
 include/linux/wait.h               |  15 ++
 19 files changed, 473 insertions(+), 437 deletions(-)

-- 
Jens Axboe