From: Andrew Morton <akpm@linux-foundation.org>

Put this back - unionfs uses it.

Please don't commit unreviewed VFS patches to fs-specific trees.

Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/writeback.h |    1 +
 1 file changed, 1 insertion(+)

diff -puN include/linux/writeback.h~git-nfs-vs-git-unionfs include/linux/writeback.h
--- a/include/linux/writeback.h~git-nfs-vs-git-unionfs
+++ a/include/linux/writeback.h
@@ -61,6 +61,7 @@ struct writeback_control {
 	unsigned for_reclaim:1;		/* Invoked from the page allocator */
 	unsigned for_writepages:1;	/* This is a writepages() call */
 	unsigned range_cyclic:1;	/* range_start is cyclic */
+	void *fs_private;               /* For use by ->writepages() */
 };
 
 /*
_