tree cab04e05f8b504b0a11d4986045bc3b08a3a1e75
parent 8366025eb80dfa0d8d94b286d53027081c280ef1
author Dave Hansen <haveblue@us.ibm.com> 1203115051 -0800
committer Al Viro <viro@zeniv.linux.org.uk> 1208579132 -0400

[PATCH] r/o bind mounts: create helper to drop file write access

If someone decides to demote a file from r/w to just
r/o, they can use this same code as __fput().

NFS does just that, and will use this in the next
patch.

AV: drop write access in __fput() only after we evict from file list.

Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Cc: Erez Zadok <ezk@cs.sunysb.edu>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J Bruce Fields" <bfields@fieldses.org>
Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>