From: Neil Brown <neilb@suse.de>

Some filesystems go oops.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/md/bitmap.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff -puN drivers/md/bitmap.c~md-dont-pass-null-file-into-prepare_write drivers/md/bitmap.c
--- devel/drivers/md/bitmap.c~md-dont-pass-null-file-into-prepare_write	2005-11-16 18:29:31.000000000 -0800
+++ devel-akpm/drivers/md/bitmap.c	2005-11-16 18:29:31.000000000 -0800
@@ -326,9 +326,9 @@ static int write_page(struct bitmap *bit
 		}
 	}
 
-	ret = page->mapping->a_ops->prepare_write(NULL, page, 0, PAGE_SIZE);
+	ret = page->mapping->a_ops->prepare_write(bitmap->file, page, 0, PAGE_SIZE);
 	if (!ret)
-		ret = page->mapping->a_ops->commit_write(NULL, page, 0,
+		ret = page->mapping->a_ops->commit_write(bitmap->file, page, 0,
 			PAGE_SIZE);
 	if (ret) {
 		unlock_page(page);
_