mm: use a folio in the softleaf_is_device_private path

Use the folio APIs in the device_private migration path of do_swap_page(),
replacing four calls to compound_head() with two page_folio() calls.  The
second one re-fetches the folio from vmf->page after migrate_to_ram(),
which might have split the folio.

Link: https://lore.kernel.org/20260819095144.45660-1-hongfu.li@linux.dev
Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Suggested-by: David Hildenbrand (Arm) <david@kernel.org>
Link: https://lore.kernel.org/all/e20678ed-3fa1-4677-a1d7-e2af481e8302@kernel.org/
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>

0 files changed, 0 insertions, 0 deletions