On Tue, Apr 01, 2014 at 05:59:34PM +0000, Taylor R Campbell wrote: > (That code was based on a userland version using i386_iopl, inb, and > outb which I did confirm to work; I've just never run it in-kernel.) A manual page or an entry to ALL/GENERIC might be reasonable (perhaps with the word "experimental"). - Jukka.