* [PATCH v2] mm/page_vma_mapped_walk: Use ptep_get_lockless() for lockless access
@ 2026-05-04 13:04 Alexander Gordeev
0 siblings, 0 replies; only message in thread
From: Alexander Gordeev @ 2026-05-04 13:04 UTC (permalink / raw)
To: Andrew Morton, David Hildenbrand, Lorenzo Stoakes,
Anshuman Khandual, Oscar Salvador
Cc: linux-s390, linux-mm, linux-kernel, Gerald Schaefer,
Heiko Carstens, Vasily Gorbik
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
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