On Fri, Dec 16, 2022 at 5:30 PM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > On Fri, Dec 16, 2022 at 04:06:24PM +0100, Andreas Gruenbacher wrote: > > + if (page_ops && page_ops->page_prepare) > > + folio = page_ops->page_prepare(iter, pos, len); > > + else > > + folio = iomap_folio_prepare(iter, pos); > > + if (IS_ERR_OR_NULL(folio)) { > > + if (!folio) > > + return (iter->flags & IOMAP_NOWAIT) ? -EAGAIN : -ENOMEM; > > + return PTR_ERR(folio); > > Wouldn't it be cleaner if iomap_folio_prepare() always > returned an ERR_PTR on failure? Yes indeed, thanks. Andreas