[PATCH v3 02/10] iov_iter: add iterator type for dmabuf maps

[Christoph Hellwig]

On Wed, Apr 29, 2026 at 04:25:48PM +0100, Pavel Begunkov wrote:
> Introduce a new iterator type for dmabuf maps. The map in an opaque
> object with internals and format specific to the subsystem / driver, and
> only it can use that subsystem / driver for issuing IO. The task of the
> middle layers is to pass the map / iterator further down, maybe doing
> basic splitting and length checking. The iterator can only be used by
> operations of the file the associated map was created for.

Nice, this ended up way simpler than what I would have imagined.

Reviewed-by: Christoph Hellwig <hch at lst.de>