On Wed, Jun 23, 2021 at 08:49:55AM +0100, Christoph Hellwig wrote: > On Tue, Jun 22, 2021 at 01:15:06PM +0100, Matthew Wilcox (Oracle) wrote: > > The pfn of a folio is the pfn of its head page. > > > > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> > > Maybe add a kerneldoc comment stating that? /** * folio_to_pfn - Return the Page Frame Number of a folio. * @folio: The folio. * * A folio may contain multiple pages. The pages have consecutive * Page Frame Numbers. * * Return: The Page Frame Number of the first page in the folio. */
