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Hello,

>> The former.  It is bad practice, IMO, to create a softc that isn't
>> really a softc.
>
> I agree; the opl driver used to do this, and it was unclear which 
> fields
> of the softc the probe routine wanted initialized. At least 10 drivers
> used this, initializing the softc slightly differently. Some uses 
> memset()
> to 0 it initialized iot and ioh, others set an additional field and 
> did not
> bother with the rest.

Just for the records - I threw a hack like this out of the zs driver a 
while ago.

And something completely different - opl at yds and mpu at yds both 
crash on macppc when attaching - probably related?

have fun
Michael
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