On Fri, Apr 29, 2022 at 06:24:48PM +0100, Matthew Wilcox (Oracle) wrote: > Filesystems do not necessarily set PageError; instead they will leave > PageUptodate clear on errors. We should also kmap() the page before > accessing it in case the page is allocated from HIGHMEM. The PageError to PageUptodate change looks sane. But block device page cache absolutely must not be in highmem, so I don't see a point in the kmap conversion here.
