PS/2 and USB keyboard at the same time, where to start

[M. Warner Losh]

In message: <20040710212822.GX41460 at seven.alameda.net>
            Ulf Zimmermann <ulf at Alameda.net> writes:
: I want to try myself on kernel hacking again and a thing which peaked my
: interest was some emails a few days ago about making the kernel use both
: PS/2 and USB keyboards at the same time. My questions is can anyone point
: me at the relevant pieces of the kernel I should study about trying myself
: on this?

There's already a keyboard mux in the kernel.  You'll just need to
make it max many to 1.

Warner