On Tue, Jul 20, 2021 at 08:52:43AM +0200, Christoph Hellwig wrote:

On Mon, Jul 19, 2021 at 07:39:49PM +0100, Matthew Wilcox (Oracle) wrote:

quoted

-static void
-iomap_page_release(struct page *page)
+static void iomap_page_release(struct folio *folio)
 {
-	struct iomap_page *iop = detach_page_private(page);
-	unsigned int nr_blocks = i_blocks_per_page(page->mapping->host, page);
+	struct iomap_page *iop = folio_detach_private(folio);
+	unsigned int nr_blocks = i_blocks_per_folio(folio->mapping->host,
+							folio);

Nit: but I find this variant much easier to read:

	unsigned int nr_blocks =
		i_blocks_per_folio(folio->mapping->host, folio);

Probably even better ...

	struct inode *inode = folio->mapping->host;
	unsigned int nr_blocks = i_blocks_per_folio(inode, folio);