What has replaced the traditional cdevsw in the new world order for
device attachment?  I'm trying to port some code forward to 2.0 and I
have a line

 (*cdevsw[major(sc->cdev)].d_ioctl)(sc->cdev,...);

What is a suitable repalcement for this in the new device attachment
framework?  Is there a simple change I should make, or will I need to
do something more elaborate (such as change my paradigm)?  Or do I need
to show more details for those questions to be answerable?

And, is there somewhere I can find these answers for myself?
/usr/share/doc does not appear to contain anything helpful.  I did some
poking around with man -k, but almost everything either turned up no
hits or far too many hits to be of any use.  "man -k device | egrep 9"
looked hopeful, but the only thing that looked promising was device(9),
which doesn't seem to help any - it doesn't talk about the [bc]devsw
glue from the caller's perspective, and only barely from the device
driver's perspective.

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