switch open-coded instances of d_make_root() to new helper

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 8e3b36a..06fdcc9 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -483,10 +483,9 @@
 
 	sb->s_d_op = &adfs_dentry_operations;
 	root = adfs_iget(sb, &root_obj);
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
 		int i;
-		iput(root);
 		for (i = 0; i < asb->s_map_size; i++)
 			brelse(asb->s_map[i].dm_bh);
 		kfree(asb->s_map);