Code review comment for lp:~afrantzis/mir/remove-set-gbm-device-nested

244 + auto request_ptr = reinterpret_cast<MirMesaSetGBMDeviceRequest*>(
245 + request_msg.data.data());

Here and elsewhere you're reinterpret_casting data allocated with a uint8_t alignment to structure that needs stricter alignment (e.g. int or type*). That isn't safe (and even on processors where it is "safe" can be very inefficient.