1626 static struct folio *stable_node_dup(struct ksm_stable_node **_stable_node_dup,  in stable_node_dup()  function
1765 	return stable_node_dup(_stable_node_dup, _stable_node, root,  in __stable_node_chain()
1798 	struct ksm_stable_node *stable_node, *stable_node_dup;  in stable_tree_search()  local
1822 		tree_folio = chain_prune(&stable_node_dup, &stable_node, root);  in stable_tree_search()
1860 			if (!is_page_sharing_candidate(stable_node_dup)) {  in stable_tree_search()
1883 			tree_folio = ksm_get_folio(stable_node_dup,  in stable_tree_search()
1897 			if (get_kpfn_nid(stable_node_dup->kpfn) !=  in stable_tree_search()
1898 			    NUMA(stable_node_dup->nid)) {  in stable_tree_search()
1929 	if (stable_node_dup == stable_node) {  in stable_tree_search()
1930 		VM_BUG_ON(is_stable_node_chain(stable_node_dup));  in stable_tree_search()
1931 		VM_BUG_ON(is_stable_node_dup(stable_node_dup));  in stable_tree_search()
1937 			rb_replace_node(&stable_node_dup->node,  in stable_tree_search()
1945 			rb_erase(&stable_node_dup->node, root);  in stable_tree_search()
1950 		__stable_node_dup_del(stable_node_dup);  in stable_tree_search()
1964 	stable_node_dup->head = &migrate_nodes;  in stable_tree_search()
1965 	list_add(&stable_node_dup->list, stable_node_dup->head);  in stable_tree_search()
1977 	if (stable_node_dup == stable_node) {  in stable_tree_search()
1978 		VM_BUG_ON(is_stable_node_dup(stable_node_dup));  in stable_tree_search()
1980 		stable_node = alloc_stable_node_chain(stable_node_dup,  in stable_tree_search()
1991 	VM_BUG_ON(!is_stable_node_dup(stable_node_dup));  in stable_tree_search()
2013 	struct ksm_stable_node *stable_node, *stable_node_dup;  in stable_tree_insert()  local
2029 		tree_folio = chain(&stable_node_dup, &stable_node, root);  in stable_tree_insert()
2057 	stable_node_dup = alloc_stable_node();  in stable_tree_insert()
2058 	if (!stable_node_dup)  in stable_tree_insert()
2061 	INIT_HLIST_HEAD(&stable_node_dup->hlist);  in stable_tree_insert()
2062 	stable_node_dup->kpfn = kpfn;  in stable_tree_insert()
2063 	stable_node_dup->rmap_hlist_len = 0;  in stable_tree_insert()
2064 	DO_NUMA(stable_node_dup->nid = nid);  in stable_tree_insert()
2066 		rb_link_node(&stable_node_dup->node, parent, new);  in stable_tree_insert()
2067 		rb_insert_color(&stable_node_dup->node, root);  in stable_tree_insert()
2074 				free_stable_node(stable_node_dup);  in stable_tree_insert()
2078 		stable_node_chain_add_dup(stable_node_dup, stable_node);  in stable_tree_insert()
2081 	folio_set_stable_node(kfolio, stable_node_dup);  in stable_tree_insert()
2083 	return stable_node_dup;  in stable_tree_insert()