1356 static struct page *stable_node_dup(struct stable_node **_stable_node_dup,  in stable_node_dup()  function
1520 	return stable_node_dup(_stable_node_dup, _stable_node, root,  in __stable_node_chain()
1559 	struct stable_node *stable_node, *stable_node_dup, *stable_node_any;  in stable_tree_search()  local
1582 		tree_page = chain_prune(&stable_node_dup, &stable_node,	root);  in stable_tree_search()
1595 		if (!stable_node_dup) {  in stable_tree_search()
1619 		VM_BUG_ON(!stable_node_dup ^ !!stable_node_any);  in stable_tree_search()
1654 			if (!stable_node_dup) {  in stable_tree_search()
1677 			tree_page = get_ksm_page(stable_node_dup,  in stable_tree_search()
1691 			if (get_kpfn_nid(stable_node_dup->kpfn) !=  in stable_tree_search()
1692 			    NUMA(stable_node_dup->nid)) {  in stable_tree_search()
1723 	if (stable_node_dup == stable_node) {  in stable_tree_search()
1724 		VM_BUG_ON(is_stable_node_chain(stable_node_dup));  in stable_tree_search()
1725 		VM_BUG_ON(is_stable_node_dup(stable_node_dup));  in stable_tree_search()
1731 			rb_replace_node(&stable_node_dup->node,  in stable_tree_search()
1739 			rb_erase(&stable_node_dup->node, root);  in stable_tree_search()
1744 		__stable_node_dup_del(stable_node_dup);  in stable_tree_search()
1758 	stable_node_dup->head = &migrate_nodes;  in stable_tree_search()
1759 	list_add(&stable_node_dup->list, stable_node_dup->head);  in stable_tree_search()
1764 	if (!stable_node_dup)  in stable_tree_search()
1765 		stable_node_dup = stable_node_any;  in stable_tree_search()
1774 	if (stable_node_dup == stable_node) {  in stable_tree_search()
1775 		VM_BUG_ON(is_stable_node_chain(stable_node_dup));  in stable_tree_search()
1776 		VM_BUG_ON(is_stable_node_dup(stable_node_dup));  in stable_tree_search()
1778 		stable_node = alloc_stable_node_chain(stable_node_dup,  in stable_tree_search()
1790 	VM_BUG_ON(!is_stable_node_dup(stable_node_dup));  in stable_tree_search()
1812 	struct stable_node *stable_node, *stable_node_dup, *stable_node_any;  in stable_tree_insert()  local
1829 		tree_page = chain(&stable_node_dup, stable_node, root);  in stable_tree_insert()
1830 		if (!stable_node_dup) {  in stable_tree_insert()
1854 		VM_BUG_ON(!stable_node_dup ^ !!stable_node_any);  in stable_tree_insert()
1882 	stable_node_dup = alloc_stable_node();  in stable_tree_insert()
1883 	if (!stable_node_dup)  in stable_tree_insert()
1886 	INIT_HLIST_HEAD(&stable_node_dup->hlist);  in stable_tree_insert()
1887 	stable_node_dup->kpfn = kpfn;  in stable_tree_insert()
1888 	set_page_stable_node(kpage, stable_node_dup);  in stable_tree_insert()
1889 	stable_node_dup->rmap_hlist_len = 0;  in stable_tree_insert()
1890 	DO_NUMA(stable_node_dup->nid = nid);  in stable_tree_insert()
1892 		rb_link_node(&stable_node_dup->node, parent, new);  in stable_tree_insert()
1893 		rb_insert_color(&stable_node_dup->node, root);  in stable_tree_insert()
1900 				free_stable_node(stable_node_dup);  in stable_tree_insert()
1904 		stable_node_chain_add_dup(stable_node_dup, stable_node);  in stable_tree_insert()
1907 	return stable_node_dup;  in stable_tree_insert()