+ mm-task_mmu-use-a-folio-in-clear_refs_pte_range.patch added to mm-unstable branch

+ mm-task_mmu-use-a-folio-in-clear_refs_pte_range.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: task_mmu: use a folio in clear_refs_pte_range()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-task_mmu-use-a-folio-in-clear_refs_pte_range.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-task_mmu-use-a-folio-in-clear_refs_pte_range.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: mm: task_mmu: use a folio in clear_refs_pte_range()
Date: Fri, 10 Nov 2023 11:33:23 +0800

Use a folio to save two compound_head() calls in clear_refs_pte_range().

Link: https://lkml.kernel.org/r/20231110033324.2455523-7-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Gregory Price <gregory.price@memverge.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/proc/task_mmu.c |   16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

--- a/fs/proc/task_mmu.c~mm-task_mmu-use-a-folio-in-clear_refs_pte_range
+++ a/fs/proc/task_mmu.c
@@ -1161,7 +1161,7 @@ static int clear_refs_pte_range(pmd_t *p
 	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 *p
 		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 @@ out:
 		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();
_

Patches currently in -mm which might be from wangkefeng.wang@huawei.com are

fs-proc-page-remove-unneeded-pagetail-pageslab-check.patch
fs-proc-page-use-a-folio-in-stable_page_flags.patch
fs-proc-page-respect-folio-head-page-flag-placement.patch
mm-huge_memory-use-more-folio-api-in-__split_huge_page_tail.patch
mm-task_mmu-use-a-folio-in-smaps_account.patch
mm-task_mmu-use-a-folio-in-clear_refs_pte_range.patch
page_idle-kill-page-idle-and-young-wrapper.patch