From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 5431D281525 for ; Tue, 24 Feb 2026 05:12:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771909963; cv=none; b=IPLAE4gI0goL22vkf9EUr1i14ILhBQL8HCpPG0sKj7DF7SXdlUNGCiHjO1NyirAjgNki5IqOQQCe/JKFXhO/0ElxJG/gSN8nCJDyZykK7UK8g5SRFtyMYmYDzNp4KjBGbIApEloQqGv6GstDztSgMyBAq+OnL68bDjaXq9Wfxl8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771909963; c=relaxed/simple; bh=MSbNqHntEOF2pIRHYTQnXHx7z0t7fFKGKHT7xKlR1kM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pqVC1Fv6aD2HRfHizYRtGUuhGgF8BROPSKQ/GOXIgK5ypFjEnFRwnpNqvue9b4/wxK/ZY90lNyz6o2+4ZXUQU8cXbNR0e3mhnu8gM039kUMc4hHi6IzHyF803bWgOknzi8Cck7aDWAMQP4wXDEP/VNNd6LqLKhSDUlmNxRIRkZ0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7AE95339; Mon, 23 Feb 2026 21:12:33 -0800 (PST) Received: from a085714.blr.arm.com (a085714.arm.com [10.164.18.87]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 8FBEC3F7BD; Mon, 23 Feb 2026 21:12:35 -0800 (PST) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org Cc: Anshuman Khandual , Catalin Marinas , Will Deacon , Ryan Roberts , Mark Rutland , Lorenzo Stoakes , Andrew Morton , David Hildenbrand , Mike Rapoport , Linu Cherian , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC V1 03/16] mm: Replace READ_ONCE() in pud_trans_unstable() Date: Tue, 24 Feb 2026 10:41:40 +0530 Message-ID: <20260224051153.3150613-4-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260224051153.3150613-1-anshuman.khandual@arm.com> References: <20260224051153.3150613-1-anshuman.khandual@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace READ_ONCE() with the existing standard page table accessor for PUD aka pudp_get() in pud_trans_unstable(). This does not create any functional change for platforms that do not override pudp_get(), which still defaults to READ_ONCE(). Cc: Andrew Morton Cc: David Hildenbrand Cc: Lorenzo Stoakes Cc: Mike Rapoport Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- include/linux/pgtable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 8858b8b03a02..397a0cd99ebd 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -2008,7 +2008,7 @@ static inline int pud_trans_unstable(pud_t *pud) { #if defined(CONFIG_TRANSPARENT_HUGEPAGE) && \ defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) - pud_t pudval = READ_ONCE(*pud); + pud_t pudval = pudp_get(pud); if (pud_none(pudval) || pud_trans_huge(pudval)) return 1; -- 2.43.0