rem: dprintf("read_sem:  %d\n", cnt);
add: dprintf("read_sem:  %ld\n", cnt);
context: _dump_port_info(struct port_entry *port){	int cnt;	dprintf("PORT:   %p\n", port);	dprintf("name:  '%s'\n", port->name);	dprintf("owner: 0x%x\n", port->owner);	dprintf("cap:  %d\n", port->capacity);	dprintf("head: %d\n", port->head);	dprintf("tail: %d\n", port->tail); 	get_sem_count(port->read_sem, &cnt); 	dprintf("read_sem:  %d\n", cnt); 	get_sem_count(port->read_sem, &cnt);	dprintf("write_sem: %d\n", cnt);}