On Mon, Nov 13, 2023 at 11:22:18PM +0800, Kefeng Wang wrote:
> Use a folio in validate_page_before_insert() to save two
> compound_head() calls.
>
Reviewed-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
> Reviewed-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
> ---
> mm/memory.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/mm/memory.c b/mm/memory.c
> index c32954e16b28..379354b35891 100644
> --- a/mm/memory.c
> +++ b/mm/memory.c
> @@ -1841,9 +1841,12 @@ pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
>
> static int validate_page_before_insert(struct page *page)
> {
> - if (PageAnon(page) || PageSlab(page) || page_has_type(page))
> + struct folio *folio = page_folio(page);
> +
> + if (folio_test_anon(folio) || folio_test_slab(folio) ||
> + page_has_type(page))
> return -EINVAL;
> - flush_dcache_page(page);
> + flush_dcache_folio(folio);
> return 0;
> }
>
> --
> 2.27.0
