[PULL REQUEST] Ext2, ext3 and quota fixes

[Jan Kara <jack@suse.cz>]

  Hello Linus,

  could you please pull from

git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git for_linus

Interesting bits are:
* removal of a special i_mutex locking subclass
  (I_MUTEX_QUOTA) since quota code does not need i_mutex anymore in any
  unusual way. 
* backport (from ext4) of a fix of a checkpointing bug (missing cache
  flush) that could lead to fs corruption on power failure

The rest are just random small fixes & cleanups.

Top of the tree is 0324876. The full shortlog is:

Akira Fujita (1):
      ext3: remove max_debt in find_group_orlov()

Artem Bityutskiy (2):
      ext2: write superblock only once on unmount
      ext2: do not register write_super within VFS

Eric Sandeen (1):
      ext3: return 32/64-bit dir name hash according to usage type

Jan Kara (12):
      jbd: Refine commit writeout logic
      ext2: Remove s_dirt handling
      jbd: Split updating of journal superblock and marking journal empty
      jbd: protect all log tail updates with j_checkpoint_mutex
      jbd: Write journal superblock with WRITE_FUA after checkpointing
      quota: Fix double lock in add_dquot_ref() with CONFIG_QUOTA_DEBUG
      ext3: Remove i_mutex use from ext3_quota_write()
      ext4: Remove i_mutex use from ext4_quota_write()
      reiserfs: Remove i_mutex use from reiserfs_quota_write()
      ext2: Remove i_mutex use from ext2_quota_write()
      quota: Use precomputed value of sb_dqopt in dquot_quota_sync
      quota: Get rid of nested I_MUTEX_QUOTA locking subclass

Stefan Hajnoczi (1):
      ext3: update documentation with barrier=1 default

Wang Sheng-Hui (2):
      ext2: remove the redundant comment for ext2_export_ops
      ext2: trivial fix to comment for ext2_free_blocks

The diffstat is

 Documentation/filesystems/ext3.txt |    6 +-
 fs/ext2/balloc.c                   |    4 +-
 fs/ext2/ialloc.c                   |    2 -
 fs/ext2/super.c                    |   18 +---
 fs/ext2/xattr.c                    |    1 -
 fs/ext3/dir.c                      |  167 +++++++++++++++++++++--------
 fs/ext3/ext3.h                     |    6 +-
 fs/ext3/hash.c                     |    4 +-
 fs/ext3/ialloc.c                   |   20 +---
 fs/ext3/super.c                    |    6 +-
 fs/ext4/super.c                    |    6 +-
 fs/jbd/checkpoint.c                |   23 ++---
 fs/jbd/commit.c                    |   21 +++-
 fs/jbd/journal.c                   |  206 +++++++++++++++++++++++------------
 fs/jbd/transaction.c               |    2 -
 fs/quota/dquot.c                   |   32 +++---
 fs/reiserfs/super.c                |    6 +-
 include/linux/jbd.h                |   18 ++--
 include/trace/events/jbd.h         |   39 +++----
 19 files changed, 342 insertions(+), 245 deletions(-)

							Thanks
								Honza