Creating /dev/dk* nodes so as to be persistent

["Thomas Mueller" <mueller6724%bellsouth.net@localhost>]

How do I create /dev/dk0, /dev/dk1 ... so as to be persistent?

I need more than the 15 or 16 that I get.

I can cd /dev and
./MAKEDEV dk16 dk17 dk18 dk19
or more, but these don't show after the next reboot.

Make the change by editing /dev/MAKEDEV?

I recently downloaded (cvs checkout) the current source tree and noticed a 
reference to xhci in
$SRCDIR/sys/arch/i386/conf/ALL 
and built a kernel for amd64 with this addition, but kernel build failed for 
i386.

If xhci really means USB 3.0 support, I will need up to dk27 or more.

If anybody has tried this xhci, I would like to know how well it works.

Tom