---
 fs/libfs.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6/fs/libfs.c
===================================================================
--- linux-2.6.orig/fs/libfs.c	2007-08-28 14:37:58.000000000 -0700
+++ linux-2.6/fs/libfs.c	2007-08-28 14:38:30.000000000 -0700
@@ -341,10 +341,10 @@ int simple_prepare_write(struct file *fi
 			unsigned from, unsigned to)
 {
 	if (!PageUptodate(page)) {
-		if (to - from != page_cache_size(file->f_mapping))
+		if (to - from != compound_size(page))
 			zero_user_segments(page,
 				0, from,
-				to, page_cache_size(file->f_mapping));
+				to, compound_size(page));
 	}
 	return 0;
 }