[PATCHv5 1/8] blk-mq-dma: introduce blk_map_iter

[Christoph Hellwig]

On Mon, Aug 11, 2025 at 07:30:53AM -0600, Keith Busch wrote:
> Perhaps I misunderstood the assignment:
> 
>   https://lore.kernel.org/linux-block/20250722055339.GB13634@lst.de/
> 
> I thought you were saying you wanted the lower (bvec pages -> phys
> addrs) and upper part (phys -> dma) available as an API rather than
> keeping the lower part private to blk-dma. This patch helps move towards
> that, and in the next patch provides a common place to stash the bvec
> array that's being iterated.

Eventually we might want to make it public, yes.  But that works just
fine with the phys_vec.  In fact Leon has a series outstanding currently
that makes struct phys_vec public without any other changes to this
code.