NUMA
tl[i] = SDTL_INIT(sd_numa_mask, cpu_numa_flags, NUMA);
root_unstable_tree + NUMA(rmap_item->nid));
NUMA(stable_node_dup->nid)) {
NUMA(stable_node->nid)) {
rb_erase(&dup->node, root_stable_tree + NUMA(dup->nid));
return ksm_merge_across_nodes ? 0 : NUMA(pfn_to_nid(kpfn));