On Mon, 2014-11-17 at 12:52 -0800, Linus Torvalds wrote:

Maybe "dma_*mb()" would be acceptable, and ends up having the same
naming convention as "smb_*mb()", and explains what it's about.

Yes, that was what I was about to suggest as well.

And yes, in the same spirit, it would probably be good to try to
eventually get rid of the plain "*mb()" functions, and perhaps call
them "mmio_*mb()" to clarify that they are about ordering memory wrt
mmio.

It will always be somewhat unclear to users who don't read the doc
anyway :)

IE. the dma_* ones do only DMA vs DMA (or vs other processors) but the 
mmio_* one do anything vs anything. Not a huge deal tho. I still like
dma_* for Alexander's new stuff but I wouldn't bother with changing the
existing ones.

Ben.