On Mon, Dec 12, 2005 at 08:12:44AM +0100, Michael Hanke wrote: > $ nm --print-size --defined-only /lib/modules/`uname -r`/kernel/drivers/media/dvb/ttpci/dvb-ttpci.ko | grep av7110_debug > 0000000000000000 0000000000000004 B av7110_debug OK, as expected ints (and thus enums) are 32bits, thus sizeof(struct dvb_frontend_info) should be the same in 64bit kernel and 32bit userspace, hence no 32 vs. 64 bit ioctl problem. Whatever went wrong in the Debian kernel is someting completely different. Johannes