use_tree          957 uvm/uvm_map.c  	int			use_tree = 0;
use_tree          999 uvm/uvm_map.c  			use_tree = 1;
use_tree         1006 uvm/uvm_map.c  		use_tree = 1;
use_tree         1011 uvm/uvm_map.c  	if (use_tree) {