On Tue, Nov 19, 2024 at 10:46:52AM -0500, Brian Foster wrote: > I thought about using ->private along with a custom ->get_folio(), but I > don't think that really fits the idea of a built-in mechanism. It might > be more appropriate to attach to the iter, but that currently isn't > accessible to ->iomap_begin(). I suppose we could define an > iomap_to_iter() or some such helper that the fill helper could use to > populate the batch, but maybe there are other thoughts/ideas? The iter is the right place, and you can get at it using container_of as already done by btrfs (and osme of my upcoming code): struct iomap_iter *iter = container_of(iomap, struct iomap_iter, iomap);