[PATCH 0/3 v3] xfs: simplify superblock logging

[Dave Chinner]

Hi folks,

This patchset removes all the field-flag based logging and writeback
updates from the superblock and replaces it with "whole structure"
updates and logging as done for other buffer updates. Previous
versions:

http://oss.sgi.com/archives/xfs/2014-07/msg00465.html
http://oss.sgi.com/archives/xfs/2014-09/msg00397.html

Comments welcome.

-Dave.

Version 3:
- rebased on current for-next
- dropped xfs_fs_writeable changes as that's already been merged.
- fixed endian conversion in quota flags updates
- updated transaction type definitions

Version 2:
- added initial patch to sanitse xfs_fs_writeable
- updated comments to describe caller requirements for
  xfs_sync_sb()