Pull GFS2 updates from Bob Peterson:
 "Here are the patches we've accumulated for GFS2 for the current
  upstream merge window.  We have a good mixture this time.  Here are
  some of the features:

   - Fix a problem with RO mounts writing to the journal.

   - Further improvements to quotas on GFS2.

   - Added support for rename2 and RENAME_EXCHANGE on GFS2.

   - Increase performance by making glock lru_list less of a bottleneck.

   - Increase performance by avoiding unnecessary buffer_head releases.

   - Increase performance by using average glock round trip time from all CPUs.

   - Fixes for some compiler warnings and minor white space issues.

   - Other misc bug fixes"

* tag 'gfs2-merge-window' of git://git.kernel.org:/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  GFS2: Don't brelse rgrp buffer_heads every allocation
  GFS2: Don't add all glocks to the lru
  gfs2: Don't support fallocate on jdata	files
  gfs2: s64 cast for negative quota value
  gfs2: limit quota log messages
  gfs2: fix quota updates on block boundaries
  gfs2: fix shadow warning in gfs2_rbm_find()
  gfs2: kerneldoc warning fixes
  gfs2: convert simple_str to kstr
  GFS2: make sure S_NOSEC flag isn't overwritten
  GFS2: add support for rename2 and RENAME_EXCHANGE
  gfs2: handle NULL rgd in set_rgrp_preferences
  GFS2: inode.c: indent with TABs, not spaces
  GFS2: mark the journal idle to fix ro mounts
  GFS2: Average in only non-zero round-trip times for congestion stats
  GFS2: Use average srttb value in congestion calculations