On Tue, Apr 02, 2024 at 07:50:45PM +0200, Alexey Gladkov wrote: > +struct console_font_info { > + unsigned int min_width, min_height; /* minimal font size */ > + unsigned int max_width, max_height; /* maximum font size */ > + unsigned int flags; /* KD_FONT_INFO_FLAG_* */ > +}; As Jiri said, this will not work for an ioctl structure at all, sorry. Please read the kernel documentation about how to write a new ioctl for how to do this correctly (hint, you can not use 'unsigned int' in a structure that crosses the kernel/user boundry for new ioctls.) thanks, greg k-h