263         chunk->head = it;  in do_item_alloc()
307     item **head, **tail;  in do_item_link_q()  local
310     head = &heads[it->slabs_clsid];  in do_item_link_q()
312     assert(it != *head);  in do_item_link_q()
313     assert((*head && *tail) || (*head == 0 && *tail == 0));  in do_item_link_q()
315     it->next = *head;  in do_item_link_q()
317     *head = it;  in do_item_link_q()
331     item **head, **tail;  in do_item_unlink_q()  local
332     head = &heads[it->slabs_clsid];  in do_item_unlink_q()
335     if (*head == it) {  in do_item_unlink_q()
337         *head = it->next;  in do_item_unlink_q()
1198     item **head, **tail;  in crawler_link_q()  local
1202     head = &heads[it->slabs_clsid];  in crawler_link_q()
1206     assert((*head && *tail) || (*head == 0 && *tail == 0));  in crawler_link_q()
1214     if (*head == 0) *head = it;  in crawler_link_q()
1219     item **head, **tail;  in crawler_unlink_q()  local
1220     head = &heads[it->slabs_clsid];  in crawler_unlink_q()
1223     if (*head == it) {  in crawler_unlink_q()
1225         *head = it->next;  in crawler_unlink_q()
1242     item **head, **tail;  in crawler_crawl_q()  local
1245     head = &heads[it->slabs_clsid];  in crawler_crawl_q()
1250         assert(*head == it);  in crawler_crawl_q()
1252             *head = it->next;  in crawler_crawl_q()
1263         if (*head == it->prev) {  in crawler_crawl_q()
1265             *head = it;  in crawler_crawl_q()