cds_list_for_each_entry_safe(index, tmp, ®istry, node) {
if (!rcu_old_gp_ongoing(&index->ctr))
cds_list_move(&index->node, &qsreaders);
cds_list_for_each_entry_safe(index, tmp, ®istry, node) {
if (!rcu_old_gp_ongoing(&index->ctr))
cds_list_move(&index->node, &qsreaders);