TAILQ_CONCAT
TAILQ_CONCAT(&pv_chunks, &newtail, pc_lru);
TAILQ_CONCAT(&pc.pc_ptpages, &pmap->pm_ptpages[0], ptp_list);
TAILQ_CONCAT(&pc.pc_ptpages, &pmap->pm_ptpages[1], ptp_list);
TAILQ_CONCAT(&freelist, &locklist, chain);