On Mon, Sep 28, 2026 at 02:32:18PM +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. > > Suggested-by: Keith Busch <[email protected]> > Reviewed-by: Christoph Hellwig <[email protected]> > Signed-off-by: Pavel Begunkov <[email protected]>
FYI, I think the Sashiko complaint about iterate_and_advance2 is correct here. We don't really hit that in the series, but leaving iov_iter methods partially implemented and fall through to others seems dangerous. At minimum that needs a WARN_ON to catch that case.
