On Mon, Jul 10, 2023 at 02:02:45PM +0100, Matthew Wilcox (Oracle) wrote: > copy_page_from_iter_atomic() already handles !highmem compound > pages correctly, but if we are passed a highmem compound page, > each base page needs to be mapped & unmapped individually. > > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Reviewed-by: Kent Overstreet <kent.overstreet@xxxxxxxxx> I just pulled this into the bcachefs tree; in a week or two if you haven't heard anything you can add my Tested-by: