Commit f0327de7 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Andrew Morton
Browse files

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: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: default avatarDavid Hildenbrand <david@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent b9a25635

mm/gup.c

+4 −4
Original line number Diff line number Diff line
@@ -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);