> > i personally prefer everything typed as far as possible.
> > 
> > int kauth_authorize_device_passthrough(kauth_cred_t cred, dev_t controller,
> >     const void *user_request);
> 
> hrm. that seems overkill to me...

anyone has his own taste. :-)

> > btw, isn't it better to move RAWIO to the device scope?
> 
> for both memory and disk?

yes.
device scope is appropriate as far as they are about specfs, IMO.

YAMAMOTO Takashi