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Wed, 12 Nov 2025 17:47:03 -0800 (PST) From: Samuel Holland To: Palmer Dabbelt , Paul Walmsley , linux-riscv@lists.infradead.org, Andrew Morton , David Hildenbrand , linux-mm@kvack.org Cc: devicetree@vger.kernel.org, Suren Baghdasaryan , linux-kernel@vger.kernel.org, Mike Rapoport , Michal Hocko , Conor Dooley , Lorenzo Stoakes , Krzysztof Kozlowski , Alexandre Ghiti , Emil Renner Berthing , Rob Herring , Vlastimil Babka , "Liam R . Howlett" , Anshuman Khandual , Dev Jain , Oscar Salvador , Lance Yang , Samuel Holland Subject: [PATCH v3 03/22] mm/dirty: replace READ_ONCE() with pudp_get() Date: Wed, 12 Nov 2025 17:45:16 -0800 Message-ID: <20251113014656.2605447-4-samuel.holland@sifive.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20251113014656.2605447-1-samuel.holland@sifive.com> References: <20251113014656.2605447-1-samuel.holland@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: A01D980004 X-Stat-Signature: dcfrr1qhnw5e84sikq9gffuaerktucja X-Rspamd-Server: rspam02 X-Rspam-User: X-HE-Tag: 1762998424-444059 X-HE-Meta: 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 BqX0KusK 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Anshuman Khandual 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 Acked-by: David Hildenbrand Reviewed-by: Dev Jain Reviewed-by: Oscar Salvador Cc: Lance Yang Signed-off-by: Andrew Morton Signed-off-by: Samuel Holland --- Changes in v3: - New patch for v3 (cherry-picked from linux-next) mm/mapping_dirty_helpers.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/mapping_dirty_helpers.c b/mm/mapping_dirty_helpers.c index c193de6cb23a..737c407f4081 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)) { -- 2.47.2