[GIT PULL] Block fixes for 4.2-rc3

[GIT PULL] Block fixes for 4.2-rc3

[Jens Axboe]

Hi Linus,

Four smaller fixes for the current series. This pull request contains:

- A fix for clones of discard bio's, that can cause data corruption.
  From Martin.

- A fix for null_blk, where in certain queue modes it could access a
  request after it had been freed. From Mike Krinkin.

- An error handling leak fix for blkcg, from Tejun.

- Also from Tejun, export of the functions that a file system needs to
  implement cgroup writeback support.

Please pull!


  git://git.kernel.dk/linux-block.git for-linus


----------------------------------------------------------------
Martin K. Petersen (1):
      block: Do a full clone when splitting discard bios

Mike Krinkin (1):
      null_blk: fix use-after-free problem

Tejun Heo (2):
      blkcg: fix gendisk reference leak in blkg_conf_prep()
      block: export bio_associate_*() and wbc_account_io()

 block/bio.c              | 17 ++++++++++++++---
 block/blk-cgroup.c       |  6 +++++-
 drivers/block/null_blk.c | 18 +++++++++---------
 fs/fs-writeback.c        |  1 +
 4 files changed, 29 insertions(+), 13 deletions(-)

-- 
Jens Axboe