pci_memlist_count
extern int pci_memlist_count(struct memlist *);
return (pci_memlist_count(*res));
total = pci_memlist_count(iolist);
total += pci_memlist_count(memlist);
total += pci_memlist_count(pmemlist);
count = pci_memlist_count(pci_bus_res[bus].io_avail) +
pci_memlist_count(pci_bus_res[bus].mem_avail) +
pci_memlist_count(pci_bus_res[bus].pmem_avail);