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SubjectRe: [PATCH v11 13/33] mm/filemap: Add folio_index(), folio_file_page() and folio_contains()
On Wed, Jun 16, 2021 at 11:03:23AM +0100, David Howells wrote:
> Matthew Wilcox (Oracle) <willy@infradead.org> wrote:
>
> > folio_index() is the equivalent of page_index() for folios.
> > folio_file_page() is the equivalent of find_subpage().
> > folio_contains() is the equivalent of thp_contains().
> >
> > No changes to generated code.
> >
> > 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 <kirill.shutemov@linux.intel.com>
> > Acked-by: Vlastimil Babka <vbabka@suse.cz>
> > Reviewed-by: William Kucharski <william.kucharski@oracle.com>
>
> folio_subpage() might be a better name than folio_file_page().

I want it to be clear that you can't call this for folios which
aren't part of a file. For example, anonymous memory.

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