If the NFS_ATTR_FATTR_V4 flag is set, use the NFSv3 convention for
the 'space_used' part of the fattr.

--- old/fs/nfs/inode.c	Sun Aug 11 20:39:02 2002
+++ new/fs/nfs/inode.c	Sun Aug 11 20:39:39 2002
@@ -727,7 +727,7 @@ __nfs_fhget(struct super_block *sb, stru
 		inode->i_nlink = fattr->nlink;
 		inode->i_uid = fattr->uid;
 		inode->i_gid = fattr->gid;
-		if (fattr->valid & NFS_ATTR_FATTR_V3) {
+		if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
 			/*
 			 * report the blocks in 512byte units
 			 */
@@ -1138,7 +1138,7 @@ __nfs_refresh_inode(struct inode *inode,
 	inode->i_uid = fattr->uid;
 	inode->i_gid = fattr->gid;
 
-	if (fattr->valid & NFS_ATTR_FATTR_V3) {
+	if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
 		/*
 		 * report the blocks in 512byte units
 		 */