RE: [PATCH 2/2] mm/gup: Remove page_folio() in memfd_pin_folios()

[Kasireddy, Vivek]

Hi Vishal,

> Subject: [PATCH 2/2] mm/gup: Remove page_folio() in memfd_pin_folios()
> 
> We can get the folio directly from the folio batch, so remove the
> unnecessary page_folio() call.
> 
> Signed-off-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
> ---
>  mm/gup.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/gup.c b/mm/gup.c
> index 1fb8f3b9a493..795fd94f379d 100644
> --- a/mm/gup.c
> +++ b/mm/gup.c
> @@ -3640,7 +3640,7 @@ long memfd_pin_folios(struct file *memfd, loff_t
> start, loff_t end,
>  			}
> 
>  			for (i = 0; i < nr_found; i++) {
> -				folio = page_folio(&fbatch.folios[i]->page);
> +				folio = fbatch.folios[i];
I don't recall why I chose to extract the folio in a roundabout way. LGTM.

Acked-by: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>

Thanks,
Vivek

> 
>  				if (try_grab_folio(folio, 1, FOLL_PIN)) {
>  					folio_batch_release(&fbatch);
> --
> 2.49.0