On 28 Jan 2021, at 2:03, Matthew Wilcox (Oracle) wrote:
> This is just a convenience wrapper for callers with folios; pgdat can
> be reached from tail pages as well as head pages.
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> ---
> include/linux/mm.h | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index f20504017adf..7d787229dd40 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -1503,6 +1503,11 @@ static inline pg_data_t *page_pgdat(const struct page *page)
> return NODE_DATA(page_to_nid(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)
> {
> --
> 2.29.2
LGTM.
Reviewed-by: Zi Yan <ziy@xxxxxxxxxx>
—
Best Regards,
Yan Zi
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