unregister_hdlc_protocol
EXPORT_SYMBOL(unregister_hdlc_protocol);
unregister_hdlc_protocol(&proto);
unregister_hdlc_protocol(&proto);
unregister_hdlc_protocol(&proto);
unregister_hdlc_protocol(&proto);
unregister_hdlc_protocol(&proto);
unregister_hdlc_protocol(&proto);
void unregister_hdlc_protocol(struct hdlc_proto *proto);