[PATCH 29/31] parisc: handle page-less SG entries

Christoph Hellwig hch at lst.de
Fri Aug 14 00:31:50 AEST 2015

On Wed, Aug 12, 2015 at 09:01:02AM -0700, Linus Torvalds wrote:
> I'm assuming that anybody who wants to use the page-less
> scatter-gather lists always does so on memory that isn't actually
> virtually mapped at all, or only does so on sane architectures that
> are cache coherent at a physical level, but I'd like that assumption
> *documented* somewhere.

It's temporarily mapped by kmap-like helpers.  That code isn't in
this series. The most recent version of it is here:


note that it's not doing the cache flushing it would have to do yet, but
it's also only enabled for x86 at the moment.

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