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SubjectRe: DMA API issues

On Mon, 21 Jun 2004, Linus Torvalds wrote:
> The argument at some point was that some architectures may not even _have_
> a "struct page" for DMA memory, since it's not "normal" memory (ie "slow
> memory" on m68k). However, I thought we all agreed that such a "struct
> page" could be furnished if that architecture wants so support mmap'ing.

.. which is not to say that we shouldn't have a "pci_mmap_pages()" thing
_too_. Pretty clearly the easiest interface often is to just map the pages
at mmap() time, and then we should just have a helper function to do that.

I thought we did one already, but hey, maybe not.

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