Re: [PATCH v2 28/46] mm/writeback: Add filemap_dirty_folio()

On Tue, Jun 22, 2021 at 01:15:33PM +0100, Matthew Wilcox (Oracle) wrote:

Reimplement __set_page_dirty_nobuffers() as a wrapper around
filemap_dirty_folio().  This can use a cast to struct folio
because we know that the ->set_page_dirty address space op
is always called with a page pointer that happens to also be
a folio pointer.  Saves 7 bytes of kernel text.

Modulo the cast comment from the last patch this looks fine:

Reviewed-by: Christoph Hellwig <hch@lst.de>