On 08/29/22 16:00, Sidhartha Kumar wrote:
> Helper function to retrieve hstate information from a hugetlb folio.
>
>
> Signed-off-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
> ---
> include/linux/hugetlb.h | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
> index d8742c5bf454..093b5d32d6b5 100644
> --- a/include/linux/hugetlb.h
> +++ b/include/linux/hugetlb.h
> @@ -815,10 +815,15 @@ static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift,
> }
> #endif
>
> +static inline struct hstate *folio_hstate(struct folio *folio)
> +{
> + VM_BUG_ON_FOLIO(!folio_test_hugetlb(folio), folio);
> + return size_to_hstate(folio_size(folio));
> +}
> +
> static inline struct hstate *page_hstate(struct page *page)
> {
> - VM_BUG_ON_PAGE(!PageHuge(page), page);
> - return size_to_hstate(page_size(page));
> + return folio_hstate(page_folio(page));
> }
>
> static inline unsigned hstate_index_to_shift(unsigned index)
> --
> 2.31.1
>
I would suggest including patch 7 which makes use of folio_hstate.
--
Mike Kravetz
