_map_port_change
struct _map_port_change *port_change, *tmp_port_change;
struct _map_port_change *port_change;
struct _map_port_change *port_change;
port_change = malloc(sizeof(struct _map_port_change) * num_entries,
struct _map_port_change *port_change;
struct _map_port_change *port_details;