On 5/11/21 11:47 PM, Matthew Wilcox (Oracle) wrote:
> These are just convenience wrappers for callers with folios; pgdat and
> zone can be reached from tail pages as well as head pages.
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> Reviewed-by: Zi Yan <ziy@xxxxxxxxxx>
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> Acked-by: Jeff Layton <jlayton@xxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
> ---
> include/linux/mm.h | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index b29c86824e6b..a55c2c0628b6 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -1560,6 +1560,16 @@ static inline pg_data_t *page_pgdat(const struct page *page)
> return NODE_DATA(page_to_nid(page));
> }
>
> +static inline struct zone *folio_zone(const struct folio *folio)
> +{
> + return page_zone(&folio->page);
> +}
> +
> +static inline pg_data_t *folio_pgdat(const struct folio *folio)
> +{
> + return page_pgdat(&folio->page);
> +}
> +
> #ifdef SECTION_IN_PAGE_FLAGS
> static inline void set_page_section(struct page *page, unsigned long section)
> {
>
