fuse: Convert fuse_readpages_end() to use folio_end_read()

Nobody checks the error flag on fuse folios, so stop setting it.
Optimise the (optional) setting of the uptodate flag and clearing
of the lock flag by using folio_end_read().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

Author: Matthew Wilcox (Oracle)

fs/fuse/file.c

@@ -935,14 +935,10 @@ static void fuse_readpages_end(struct fuse_mount *fm, struct fuse_args *args,
 	}
 
 	for (i = 0; i < ap->num_pages; i++) {
-		struct page *page = ap->pages[i];
+		struct folio *folio = page_folio(ap->pages[i]);
 
-		if (!err)
-			SetPageUptodate(page);
-		else
-			SetPageError(page);
-		unlock_page(page);
-		put_page(page);
+		folio_end_read(folio, !err);
+		folio_put(folio);
 	}
 	if (ia->ff)
 		fuse_file_put(ia->ff, false);