From: Anshuman Khandual <anshuman.khandual@arm.com>
Date: Mon, 6 Oct 2025 05:52:14 +0000 (+0100)
Subject: mm/dirty: replace READ_ONCE() with pudp_get()
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b4e53984f24082005a92ec76f91348a73653dadb;p=thirdparty%2Fkernel%2Flinux.git

mm/dirty: replace READ_ONCE() with pudp_get()

Replace READ_ONCE() with a standard page table accessor i.e pudp_get() that
anyways defaults into READ_ONCE() in cases where platform does not override

Link: https://lkml.kernel.org/r/20251006055214.1845342-1-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Lance Yang <lance.yang@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/mapping_dirty_helpers.c b/mm/mapping_dirty_helpers.c
index c193de6cb23a1..737c407f40812 100644
--- a/mm/mapping_dirty_helpers.c
+++ b/mm/mapping_dirty_helpers.c
@@ -149,7 +149,7 @@ static int wp_clean_pud_entry(pud_t *pud, unsigned long addr, unsigned long end,
 			      struct mm_walk *walk)
 {
 #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
-	pud_t pudval = READ_ONCE(*pud);
+	pud_t pudval = pudp_get(pud);
 
 	/* Do not split a huge pud */
 	if (pud_trans_huge(pudval)) {