rem: struct vnode *vnode = descriptor->vnode;
add: struct vnode *vnode = descriptor->u.vnode;
context: attr_read(struct file_descriptor *descriptor, off_t pos, void *buffer, size_t *length){	struct vnode *vnode = descriptor->vnode;	FUNCTION(("attr_read: buf %p, pos %Ld, len %p = %ld\n", buffer, pos, length, *length));	if (!FS_CALL(vnode, read_attr))		return EOPNOTSUPP;	return FS_CALL(vnode, read_attr)(vnode->mount->cookie, vnode->private_node, descriptor->cookie, pos, buffer, length);}