68a62226e4
When looking at the output of some CTS tests, I realized that the barriers vtn currently inserts to emulate coherent memory accesses were being turned into fences, even though we never needed to do anything special for coherent accesses before so presumably accesses are already cache-coherent by default. Ignore make_visible/make_available semantics to get us back to parity with the old path. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13599>