diff_memlists
diff_memlists(orig, new, less_pages);
diff_memlists(new, orig, more_pages);
diff_memlists(phys_avail, old_phys_avail, update_kcage_ranges);
diff_memlists(phys_install, nopp_list, kphysm_memseg);
diff_memlists(phys_install, phys_avail, kphysm_erase);
extern void diff_memlists(struct memlist *, struct memlist *,