dn_ht_scan
(void)dn_ht_scan(ht, do_del, NULL);
int dn_ht_scan(struct dn_ht *, int (*)(void *, void *), void *);
dn_ht_scan(fs->qht, copy_q_cb, a);
dn_ht_scan(s->siht, copy_si_cb, a);
dn_ht_scan(V_dn_cfg.schedhash, schk_delete_cb,
dn_ht_scan(V_dn_cfg.fshash, copy_data_helper, &a);
dn_ht_scan(V_dn_cfg.schedhash, copy_data_helper, &a);
dn_ht_scan(V_dn_cfg.fshash, fs_cleanup, &aqm->type);
dn_ht_scan(fs->qht, q_delete_cb, (void *)(uintptr_t)flags);
dn_ht_scan(s->siht, si_reset_credit, NULL);
dn_ht_scan(fs->sched->siht, si_cleanup_q, NULL);
dn_ht_scan(fs->qht, q_cleanup_q, NULL);
dn_ht_scan(s->siht, si_destroy, NULL);
dn_ht_scan(h, doprint, 0);
dn_ht_scan(h, doprint, 0);
dn_ht_scan(h, doprint, 0);