[GIT PULL -mm] 0/2 Unionfs updates/fixes/cleanups

[Erez Zadok <ezk@cs.sunysb.edu>]

The following is a series of patches related to Unionfs.

These patches were tested (where appropriate) on Linus's 2.6.24 latest code
(as of v2.6.24-rc5-43-gda8cadb), MM (MMOTM stamp-2007-12-13-15-37), as well
as the backports to 2.6.{23,22,21,20,19,18,9} on ext2/3/4, xfs, reiserfs,
nfs2/3/4, jffs2, ramfs, tmpfs, cramfs, and squashfs (where available).  Also
tested with LTP-full.  See http://unionfs.filesystems.org/ to download
back-ported unionfs code.

Please pull from the 'master' branch of
git://git.kernel.org/pub/scm/linux/kernel/git/ezk/unionfs.git

to receive the following:

Erez Zadok (2):
      Unionfs: avoid using drop_pagecache_sb in remount
      Unionfs: clarify usage.txt mount options

 Documentation/filesystems/unionfs/usage.txt |   38 +++++++++++++++++++---------
 fs/drop_caches.c                            |    4 --
 fs/unionfs/dentry.c                         |   11 ++++++++
 fs/unionfs/super.c                          |   34 ++++++++-----------------
 fs/unionfs/union.h                          |    1 
 include/linux/mm.h                          |    2 -
 6 files changed, 52 insertions(+), 38 deletions(-)

---
Erez Zadok
ezk@cs.sunysb.edu
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