Kefeng Wang <wangkefeng.wang@xxxxxxxxxx> writes:
> Save two calls to compound_head() and use folio throughout.
>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Reviewed-by: Alistair Popple <apopple@xxxxxxxxxx>
> ---
> mm/migrate_device.c | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/mm/migrate_device.c b/mm/migrate_device.c
> index 82d75205dda8..66db28b89f9b 100644
> --- a/mm/migrate_device.c
> +++ b/mm/migrate_device.c
> @@ -898,16 +898,17 @@ int migrate_device_range(unsigned long *src_pfns, unsigned long start,
> unsigned long i, pfn;
>
> for (pfn = start, i = 0; i < npages; pfn++, i++) {
> - struct page *page = pfn_to_page(pfn);
> + struct folio *folio;
>
> - if (!get_page_unless_zero(page)) {
> + folio = folio_get_nontail_page(pfn_to_page(pfn));
> + if (!folio) {
> src_pfns[i] = 0;
> continue;
> }
>
> - if (!trylock_page(page)) {
> + if (!folio_trylock(folio)) {
> src_pfns[i] = 0;
> - put_page(page);
> + folio_put(folio);
> continue;
> }
