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Subject[PATCH 3/5] mm: task_mmu: use a folio in clear_refs_pte_range()
Date
Use a folio to save two compound_head() calls in clear_refs_pte_range().

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
fs/proc/task_mmu.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 5ec06fee1f14..869f6bb89230 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1161,7 +1161,7 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
struct vm_area_struct *vma = walk->vma;
pte_t *pte, ptent;
spinlock_t *ptl;
- struct page *page;
+ struct folio *folio;

ptl = pmd_trans_huge_lock(pmd, vma);
if (ptl) {
@@ -1173,12 +1173,12 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
if (!pmd_present(*pmd))
goto out;

- page = pmd_page(*pmd);
+ folio = page_folio(pmd_page(*pmd));

/* Clear accessed and referenced bits. */
pmdp_test_and_clear_young(vma, addr, pmd);
- test_and_clear_page_young(page);
- ClearPageReferenced(page);
+ folio_test_clear_young(folio);
+ folio_clear_referenced(folio);
out:
spin_unlock(ptl);
return 0;
@@ -1200,14 +1200,14 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
if (!pte_present(ptent))
continue;

- page = vm_normal_page(vma, addr, ptent);
- if (!page)
+ folio = vm_normal_folio(vma, addr, ptent);
+ if (!folio)
continue;

/* Clear accessed and referenced bits. */
ptep_test_and_clear_young(vma, addr, pte);
- test_and_clear_page_young(page);
- ClearPageReferenced(page);
+ folio_test_clear_young(folio);
+ folio_clear_referenced(folio);
}
pte_unmap_unlock(pte - 1, ptl);
cond_resched();
--
2.27.0
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