filemap: Remove PageHWPoison check from next_uptodate_page()

Pages are individually marked as suffering from hardware poisoning.
Checking that the head page is not hardware poisoned doesn't make
sense; we might be after a subpage.  We check each page individually
before we use it, so this was an optimisation gone wrong.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>

diff --git a/mm/filemap.c b/mm/filemap.c
index daa0e23a6ee666b4fd7b7ab3b95ebd7ea156569e..39c4c46c61337e24b76cfeff9fe0dbc79f85be7d 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3253,8 +3253,6 @@ static struct page *next_uptodate_page(struct page *page,
                        goto skip;
                if (!PageUptodate(page) || PageReadahead(page))
                        goto skip;
-               if (PageHWPoison(page))
-                       goto skip;
                if (!trylock_page(page))
                        goto skip;
                if (page->mapping != mapping)