Matthew Wilcox (Oracle) [off-list ref] wrote:

Reinforce that page flags are actually in the head page by changing the
type from page to folio.  Increases the size of cachefiles by two bytes,
but the kernel core is unchanged in size.

Hopefully we can get rid of that bit of code in cachefiles soon.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Kirill A. Shutemov <redacted>
Acked-by: Vlastimil Babka <redacted>
Reviewed-by: William Kucharski <redacted>

Reviewed-by: David Howells <dhowells@redhat.com>