Re: "kbd -l" -> wskbd_displayioctl_sc uvm_fault

[Miod Vallat]

> > Do you have machdep.forceukbd=1 somewhere in /etc/sysctl.conf?
> 
> Ah, yes! And there's no USB keyboard now, I added that when the
> disk was in a real machine before I moved it to a VM.

Ok, so this is what causes the keymap pointer to be reset to NULL. Phew!
Root cause found.

Anton, could you tweak your diff so that it becomes something like

        count = 0;
        if (sc->id->t_keymap.keydesc)
                for (; sc->id->t_keymap.keydesc[count].name; count ++)
                        ...

in order to only check for a NULL pointer once?