__of_node_dup
np = __of_node_dup(NULL, full_name);
struct device_node *__of_node_dup(const struct device_node *np,
tchild = __of_node_dup(NULL, node_kbasename);
n1 = __of_node_dup(NULL, "n1");
n2 = __of_node_dup(NULL, "n2");
n21 = __of_node_dup(NULL, "n21");