Missing files device_if.h and bus_if.h

[Christopher Bowman]

line 523 of bus.h

tries to include the following files:

#include "device_if.h"
#include "bus_if.h"

however, I don't see them any where in my source tree.  Are these
missing or am I suppose to create them or are they built as part of
the build process and if the latter then why didn't I get a copy when
I built a custom kernel?

Where do I get these files?  Could someone please clue me in here?

And since I am asking questions here, I see BUS_READ_IVAR used a
couple of places but can't find it's definition.  Where is it defined?

Thanks
Christopher