+ /* We don't allow empty link except on the first node of the list */
+ if (_cds_list_first_entry(is_ctf_exp_left ?
+ &node->parent->u.ctf_expression.left :
+ &node->parent->u.ctf_expression.right,
+ struct ctf_node,
+ siblings) != node)
+ goto errperm;
+ break; /* OK */