gup: convert FOLL_TOUCH case in follow_page_pte() to folio

We already have the folio here, so just use it, removing three hidden
calls to compound_head().

Link: https://lkml.kernel.org/r/20241002151403.1345296-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/gup.c b/mm/gup.c
index 4637dab7b54f1dded0758bc696522787610ec1fd..28ae330ec4dd39152c69baac671d2953c0a522bf 100644 (file)
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -922,14 +922,14 @@ static struct page *follow_page_pte(struct vm_area_struct *vma,
        }
        if (flags & FOLL_TOUCH) {
                if ((flags & FOLL_WRITE) &&
-                   !pte_dirty(pte) && !PageDirty(page))
-                       set_page_dirty(page);
+                   !pte_dirty(pte) && !folio_test_dirty(folio))
+                       folio_mark_dirty(folio);
                /*
                 * pte_mkyoung() would be more correct here, but atomic care
                 * is needed to avoid losing the dirty bit: it is easier to use
-                * mark_page_accessed().
+                * folio_mark_accessed().
                 */
-               mark_page_accessed(page);
+               folio_mark_accessed(folio);
        }
 out:
        pte_unmap_unlock(ptep, ptl);