In my tree, I've changed bus_space_tag_t from an integer type to a pointer to a struct. Now, some debugging code in MI drivers will not compile because it tries to printf bus_space_tag_t's using the format "%x". I don't see the use of printing a bus_space_tag_t, so I am changing these dubious printfs as I find them, to leave out the bus_space_tag_t. If you have a better idea of what to do, please chime in here.
this seems the right action to me. shouldn't print something opaque...
