/* layers have to be notified. */
list_for_each_entry_reverse(scan, &io->ci_layers, cis_linkage) {
if (scan->cis_iop->op[io->ci_type].cio_advance != NULL)
scan->cis_iop->op[io->ci_type].cio_advance(env, scan,
/* layers have to be notified. */
list_for_each_entry_reverse(scan, &io->ci_layers, cis_linkage) {
if (scan->cis_iop->op[io->ci_type].cio_advance != NULL)
scan->cis_iop->op[io->ci_type].cio_advance(env, scan,