[GIT PULL REQUEST] more md bug fixes for 4.1-rc

[NeilBrown]

Hi Linus,
 please pull these fixes.
 I think raid5 is all working nicely again now.
 I think there is still a race somewhere in starting the recovery thread, but
 it is minor and I suspect I'll have it nailed soon.  Not quite this week
 though.

Thanks,
NeilBrown



The following changes since commit 8532e3439087de69bb1b71fd6be2baa6fc196a55:

  md/bitmap: remove rcu annotation from pointer arithmetic. (2015-05-21 09:14:41 +1000)

are available in the git repository at:

  git://neil.brown.name/md/ tags/md/4.1-rc5-fixes

for you to fetch changes up to 56ccc1125bc141cf63927eda7febff4216dea2d3:

  md: fix race when unfreezing sync_action (2015-05-28 18:04:45 +1000)

----------------------------------------------------------------
Assorted fixes for new RAID5 stripe-batching functionality.

Unfortunately this functionality was merged a little prematurely.
The necessary testing and code review is now complete (or as
complete as it can be) and to code passes a variety of tests
and looks quite sensible.

Also a fix for some recent locking changes - a race was introduced
which causes a reshape request to sometimes fail.  No data safety issues.

----------------------------------------------------------------
NeilBrown (10):
      md/raid5: ensure whole batch is delayed for all required bitmap updates.
      md/raid5: close race between STRIPE_BIT_DELAY and batching.
      md/raid5: Ensure a batch member is not handled prematurely.
      md/raid5: remove condition test from check_break_stripe_batch_list.
      md/raid5: duplicate some more handle_stripe_clean_event code in break_stripe_batch_list
      md/raid5: add handle_flags arg to break_stripe_batch_list.
      md/raid5: be more selective about distributing flags across batch.
      md/raid5: call break_stripe_batch_list from handle_stripe_clean_event
      md/raid5: break stripe-batches when the array has failed.
      md: fix race when unfreezing sync_action

 drivers/md/md.c    |  14 ++---
 drivers/md/raid5.c | 146 +++++++++++++++++++++++++++++++----------------------
 drivers/md/raid5.h |   5 +-
 3 files changed, 98 insertions(+), 67 deletions(-)

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