I have another little issue about errors. In the RETURN VALUE section is written: On error, (clock_t) -1 is returned, and errno is set appropriately. but no value for errno is specified. From what I found digging kernel sources the only error value returned seems to be EFAULT, if tms address make fail copy_to_user. Should be specified? Regards Simone -- Simone Piccardi - KeyID:2A972F9D - JabberID:piccardi@xxxxxxxxxxx http://piccardi.gnulinux.it - http://www.fountainpen.it Prima ti ignorano, poi ti deridono, poi ti combattono. Poi vinci. M. K. Ghandi -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html