Merge tag 'gfs2-4.16.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull GFS2 updates from Bob Peterson:
 "We've got 30 patches for this merge window. These generally fall into
  five categories:

   - code cleanups

   - patches related to adding PUNCH_HOLE support to GFS2

   - support for new fields in resource group headers

   - a few bug fixes

   - support for new fields in journal log headers. These new fields,
     which were previously unused, are designed to make it easier to
     track down file system corruption, and allow fsck.gfs2 to make more
     intelligent decisions when finding and fixing file system
     corruption.

  Details:

   - Two patches from Abhi Das, to trim the ordered writes list, which
     used to grow uncontrollably until unmount.

   - Several patches from Andreas Gruenbacher: remove an unused
     parameter from function gfs2_write_jdata_pagevec, remove a
     pointless BUG_ON, clean up an error patch in trunc_start, remove
     some unused parameters from truncate, make gfs2_journaled_truncate
     more efficient, clean up the support functions for truncate, fix
     metadata read-ahead for truncate to make it faster, fix up the
     non-recursive truncate code, rework and rename
     gfs2_block_truncate_page, generalize the non-recursive truncate
     code so it can take a range of values for punch_hole support,
     introduce new PUNCH_HOLE support that take advantage of the
     previous patches, add fallocate support with PUNCH_HOLE, fix some
     typos in the comments, add the function gfs2_max_stuffed_size to
     replace a piece of code that was needlessly repeated throughout
     GFS2, a minor cleanup to function gfs2_page_add_databufs, get rid
     of function gfs2_log_header_in in preparation for the new log
     header fields, and also fix up some missing newlines in kernel
     messages.

   - Andy Price added a new field to resource groups to indicate where
     the next one should be, to allow fsck.gfs2 to make better repairs.
     He also added new rindex fields for consistency checking, and added
     a crc field to resource group headers for consistency checking.

   - I reduced redundancy in functions common to freeing dinodes, and
     when writing log headers between the journalling code and journal
     recovery code. Also added new fields to journal log headers based
     on a prototype from Steve Whitehouse, and log the source of journal
     log headers so we can better track down journal corruption. Minor
     comment typo fix and a fix for a BUG in an unlink error path.

   - Steve Whitehouse contributed a patch to fix an incorrect use of the
     gfs2_blk2rgrpd function.

   - Tetsuo Handa contributed a patch that fixes incorrect error
     handling in function init_gfs2_fs"

* tag 'gfs2-4.16.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: (30 commits)
  gfs2: Add a few missing newlines in messages
  gfs2: Remove inode from ordered write list in gfs2_write_inode()
  GFS2: Don't try to end a non-existent transaction in unlink
  GFS2: Fix minor comment typo
  GFS2: Log the reason for log flushes in every log header
  GFS2: Introduce new gfs2_log_header_v2
  gfs2: Get rid of gfs2_log_header_in
  gfs2: Minor gfs2_page_add_databufs cleanup
  gfs2: Add gfs2_max_stuffed_size
  gfs2: Typo fixes
  gfs2: Implement fallocate(FALLOC_FL_PUNCH_HOLE)
  gfs2: Turn trunc_dealloc into punch_hole
  gfs2: Generalize truncate code
  Turn gfs2_block_truncate_page into gfs2_block_zero_range
  gfs2: Improve non-recursive delete algorithm
  gfs2: Fix metadata read-ahead during truncate
  gfs2: Clean up {lookup,fillup}_metapath
  gfs2: Remove minor gfs2_journaled_truncate inefficiencies
  gfs2: truncate: Remove unnecessary oldsize parameters
  gfs2: Clean up trunc_start error path
  ...

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