[PATCH v4 4/6] infiniband: cxgb4: Eliminate duplicate barriers on weakly-ordered archs

[Casey Leedom]

  Okay, thanks Sinan.  I ~think~ we're on the same page here.

  Our guy Michael Werner is carefully going through our drivers with Steve
Wise.  I'd like to let them work on the changes with a lot of thought and
testing before diving in too far.

  We had thought that we could get around the lack of a real Relaxed
Ordering Write on the PowerPC via the __raw_write*() API, but that isn't
really part of the defined API and various platforms define that API
differently (some doing PCI Byte Ordering rearrangements and some not).  I
think that we're going to have to work with the PowerPC platform folks to
get a real Relaxed Ordering Write.

Casey