| eeh@netbsd.org writes:
| > Given that this is supposed to reduce confusion, I'd prefer to lop
| > off some of the letters at the front rather than the part with 
| > real significance.  Is BUS_SPACE_BARRIER_W_R obvious as to what
| > it does?
|
| Uh, is "BUS_SPACE_BARRIER_WRITE_READ" obvious as to what it does?!

In my experience it's more difficult to immediately detect the
difference between BUS_SPACE_BARRIER_WRITE_READ and
BUS_SPACE_BARRIER_READ_WRITE than BUS_SPACE_BARRIER_W_R
and BUS_SPACE_BARRIER_R_W, which is likely to result in
fewere typos.

Eduardo