1348 static struct page *stable_node_dup(struct ksm_stable_node **_stable_node_dup,  in stable_node_dup()  function
1512 	return stable_node_dup(_stable_node_dup, _stable_node, root,  in __stable_node_chain()
1551 	struct ksm_stable_node *stable_node, *stable_node_dup, *stable_node_any;  in stable_tree_search()  local
1574 		tree_page = chain_prune(&stable_node_dup, &stable_node,	root);  in stable_tree_search()
1587 		if (!stable_node_dup) {  in stable_tree_search()
1611 		VM_BUG_ON(!stable_node_dup ^ !!stable_node_any);  in stable_tree_search()
1646 			if (!stable_node_dup) {  in stable_tree_search()
1669 			tree_page = get_ksm_page(stable_node_dup,  in stable_tree_search()
1683 			if (get_kpfn_nid(stable_node_dup->kpfn) !=  in stable_tree_search()
1684 			    NUMA(stable_node_dup->nid)) {  in stable_tree_search()
1715 	if (stable_node_dup == stable_node) {  in stable_tree_search()
1716 		VM_BUG_ON(is_stable_node_chain(stable_node_dup));  in stable_tree_search()
1717 		VM_BUG_ON(is_stable_node_dup(stable_node_dup));  in stable_tree_search()
1723 			rb_replace_node(&stable_node_dup->node,  in stable_tree_search()
1731 			rb_erase(&stable_node_dup->node, root);  in stable_tree_search()
1736 		__stable_node_dup_del(stable_node_dup);  in stable_tree_search()
1750 	stable_node_dup->head = &migrate_nodes;  in stable_tree_search()
1751 	list_add(&stable_node_dup->list, stable_node_dup->head);  in stable_tree_search()
1756 	if (!stable_node_dup)  in stable_tree_search()
1757 		stable_node_dup = stable_node_any;  in stable_tree_search()
1766 	if (stable_node_dup == stable_node) {  in stable_tree_search()
1767 		VM_BUG_ON(is_stable_node_dup(stable_node_dup));  in stable_tree_search()
1769 		stable_node = alloc_stable_node_chain(stable_node_dup,  in stable_tree_search()
1780 	VM_BUG_ON(!is_stable_node_dup(stable_node_dup));  in stable_tree_search()
1802 	struct ksm_stable_node *stable_node, *stable_node_dup, *stable_node_any;  in stable_tree_insert()  local
1819 		tree_page = chain(&stable_node_dup, stable_node, root);  in stable_tree_insert()
1820 		if (!stable_node_dup) {  in stable_tree_insert()
1844 		VM_BUG_ON(!stable_node_dup ^ !!stable_node_any);  in stable_tree_insert()
1872 	stable_node_dup = alloc_stable_node();  in stable_tree_insert()
1873 	if (!stable_node_dup)  in stable_tree_insert()
1876 	INIT_HLIST_HEAD(&stable_node_dup->hlist);  in stable_tree_insert()
1877 	stable_node_dup->kpfn = kpfn;  in stable_tree_insert()
1878 	set_page_stable_node(kpage, stable_node_dup);  in stable_tree_insert()
1879 	stable_node_dup->rmap_hlist_len = 0;  in stable_tree_insert()
1880 	DO_NUMA(stable_node_dup->nid = nid);  in stable_tree_insert()
1882 		rb_link_node(&stable_node_dup->node, parent, new);  in stable_tree_insert()
1883 		rb_insert_color(&stable_node_dup->node, root);  in stable_tree_insert()
1890 				free_stable_node(stable_node_dup);  in stable_tree_insert()
1894 		stable_node_chain_add_dup(stable_node_dup, stable_node);  in stable_tree_insert()
1897 	return stable_node_dup;  in stable_tree_insert()