I'm involved in a porting effort, and in dealing with the bus_space
stuff I tried to make bus_space_tag_t and bus_space_handle_t (typedefs
for) struct types.

This fell over, because (probably among others) dev/ic/com.c assumes
that bus_space_tag_t values can be compared with ==.  But no doco I've
been able to find contains any indication that these types are supposed
to be restricted in any way.

Hence my question: is the com driver broken, is the doco incomplete, or
have I just missed something?

					der Mouse

			       mouse@rodents.montreal.qc.ca
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