From: Alexander Gordeev <agordeev@linux.ibm.com>
To: Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@redhat.com>,
Lorenzo Stoakes <ljs@kernel.org>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Oscar Salvador <osalvador@suse.de>
Cc: linux-s390@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>
Subject: [PATCH v2] mm/page_vma_mapped_walk: Use ptep_get_lockless() for lockless access
Date: Mon, 4 May 2026 15:04:34 +0200 [thread overview]
Message-ID: <20260504130434.2285053-1-agordeev@linux.ibm.com> (raw)
Switch from ptep_get() to ptep_get_lockless() accessor for
PTE reads when no lock is taken.
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
---
mm/page_vma_mapped.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/page_vma_mapped.c b/mm/page_vma_mapped.c
index a4d52fdb3056..6559e17f11c2 100644
--- a/mm/page_vma_mapped.c
+++ b/mm/page_vma_mapped.c
@@ -41,7 +41,7 @@ static bool map_pte(struct page_vma_mapped_walk *pvmw, pmd_t *pmdvalp,
if (!pvmw->pte)
return false;
- ptent = ptep_get(pvmw->pte);
+ ptent = ptep_get_lockless(pvmw->pte);
if (pte_none(ptent)) {
return false;
@@ -310,7 +310,7 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk *pvmw)
goto restart;
}
pvmw->pte++;
- } while (pte_none(ptep_get(pvmw->pte)));
+ } while (pte_none(ptep_get_lockless(pvmw->pte)));
if (!pvmw->ptl) {
spin_lock(ptl);
--
2.51.0
reply other threads:[~2026-05-04 13:04 UTC|newest]
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