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gup: convert FOLL_TOUCH case in follow_page_pte() to folio

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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>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-10-02 16:13:27 +01:00 committed by Andrew Morton
parent b9a256352f
commit f0327de706
1 changed files with 4 additions and 4 deletions
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8
mm/gup.c
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@ -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);