RB_TREE_MAX
for ((N) = RB_TREE_MAX(T); (N); (N) = RB_TREE_PREV((T), (N)))
for ((N) = RB_TREE_MAX(T); \
frag = (struct chfs_node_frag *)RB_TREE_MAX(tree);
pen = (struct chfs_tmp_dnode_info *)RB_TREE_MAX(&rii->tdi_root);
this = (struct chfs_tmp_dnode_info *)RB_TREE_MAX(&ver_tree);
return (uvm_physseg_t) RB_TREE_MAX(&(uvm_physseg_graph.rb_tree));
(uvm_physseg_t) RB_TREE_MAX(&(uvm_physseg_graph.rb_tree));