[git pull] device mapper fixes for 4.4-rc5

[git pull] device mapper fixes for 4.4-rc5

[Mike Snitzer]

Hi Linus,

The following changes since commit 31ade3b83e1821da5fbb2f11b5b3d4ab2ec39db8:

  Linux 4.4-rc3 (2015-11-29 18:58:26 -0800)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm tags/dm-4.4-fixes-2

for you to fetch changes up to ed8b45a3679eb49069b094c0711b30833f27c734:

  dm btree: fix bufio buffer leaks in dm_btree_del() error path (2015-12-10 10:30:18 -0500)

Please pull, thanks!
Mike

----------------------------------------------------------------
Five stable fixes:

- Two DM btree bufio buffer leak fixes that resolve reported BUG_ONs
  during DM thinp metadata close's dm_bufio_client_destroy().

- A DM thinp range discard fix to handle discarding a partially mapped
  range.

- A DM thinp metadata snapshot fix to make sure the btree roots saved in
  the metadata snapshot are the most current.

- A DM space map metadata refcounting fix that improves both DM thinp
  and DM cache metadata.

----------------------------------------------------------------
Joe Thornber (4):
      dm thin metadata: fix bug in dm_thin_remove_range()
      dm thin metadata: fix bug when taking a metadata snapshot
      dm space map metadata: fix ref counting bug when bootstrapping a new space map
      dm btree: fix bufio buffer leaks in dm_btree_del() error path

Mike Snitzer (1):
      dm btree: fix leak of bufio-backed block in btree_split_sibling error path

 drivers/md/dm-thin-metadata.c                      |  34 ++++++-
 drivers/md/persistent-data/dm-btree.c              | 101 ++++++++++++++++++++-
 drivers/md/persistent-data/dm-btree.h              |  14 ++-
 drivers/md/persistent-data/dm-space-map-metadata.c |  32 +++++--
 4 files changed, 161 insertions(+), 20 deletions(-)