PULL REQUEST - md updates for 3.4

[NeilBrown]

The following changes since commit c16fa4f2ad19908a47c63d8fa436a1178438c7e7:

  Linux 3.3 (2012-03-18 16:15:34 -0700)

are available in the git repository at:

  git://neil.brown.name/md/ md-3.4

for you to fetch changes up to ecb178bb2b154a40cfae9fa4c42e62ccfa81ac6b:

  md: Add judgement bb->unacked_exist in function md_ack_all_badblocks(). (2012-03-19 12:46:42 +1100)

----------------------------------------------------------------
(from the branch description for md-scratch local branch)

for-linus
md updates for 3.4

Mostly tidying up code in preparation for some bigger changes
next time.
A few bug fixes tagged for -stable.

Main functionality change is that some RAID10 arrays can now
grow to use extra space that may have been made available on the
individual devices.

----------------------------------------------------------------
NeilBrown (19):
      md/raid5: make sure reshape_position is cleared on error path.
      md/raid10: remove unnecessary smp_mb() from end_sync_write
      md/raid5: removed unused 'added_devices' variable.
      md: allow re-add to failed arrays.
      md: don't set md arrays to readonly on shutdown.
      md/bitmap: ensure to load bitmap when creating via sysfs.
      md/raid1,raid10: avoid deadlock during resync/recovery.
      md: tidy up rdev_for_each usage.
      md: add proper merge_bvec handling to RAID0 and Linear.
      md/raid10: handle merge_bvec_fn in member devices.
      md/raid1: handle merge_bvec_fn in member devices.
      md/raid10 - support resizing some RAID10 arrays.
      md/bitmap: remove some unused noise from bitmap.h
      md/bitmap: move printing of bitmap status to bitmap.c
      md/bitmap: change a 'goto' to a normal 'if' construct.
      md/bitmap: remove some pointless locking.
      md/bitmap: remove unnecessary indirection when allocating.
      md/bitmap: discard CHUNK_BLOCK_SHIFT macro
      md: fix clearing of the 'changed' flags for the bad blocks list.

majianpeng (3):
      md: Use existed macros instead of numbers
      md/raid5: use atomic_dec_return() instead of atomic_dec() and atomic_read().
      md: Add judgement bb->unacked_exist in function md_ack_all_badblocks().

 drivers/md/bitmap.c       |  152 ++++++++++++++++++------------------
 drivers/md/bitmap.h       |   22 +-----
 drivers/md/dm-raid.c      |   16 ++--
 drivers/md/faulty.c       |    2 +-
 drivers/md/linear.c       |   32 ++++----
 drivers/md/md.c           |  140 ++++++++++++++--------------------
 drivers/md/md.h           |   13 +++-
 drivers/md/multipath.c    |    2 +-
 drivers/md/raid0.c        |  164 ++++++++++++++++++++++------------------
 drivers/md/raid0.h        |   11 ++-
 drivers/md/raid1.c        |   98 ++++++++++++++++++------
 drivers/md/raid10.c       |  187 +++++++++++++++++++++++++++++++++------------
 drivers/md/raid5.c        |   25 +++----
 include/linux/raid/md_p.h |    6 +-
 14 files changed, 496 insertions(+), 374 deletions(-)

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