From nobody Sun Feb 8 12:32:54 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 66C0F29B8F8 for ; Wed, 8 Oct 2025 04:21:32 +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=1759897297; cv=none; b=YotXrV+cwa9gdGxFy9sx1wwttQss8/2+QTCHvFaPN0liU4hmLE97LQDRLhl5mw2Hsxf7V6wwqTnjEQvhydijuJ8xMol0rOPyiKW9PoqDCqEiFXuOJi7X6bIXxj9rRCkBkxUtbwqAuCVheyjZmJZC8icAV1GEudwN+AQ6jUSpd2c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759897297; c=relaxed/simple; bh=z87BLegyEF33UQuQEaBxe3mjgZuRVFrt39YuYai/vw8=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Hy21SY3kwIU9brXrweiEJGOkrT2X92jezDHyVryGl2dS1VjY4LpUzXpuw5QBhdc4HjUInPb3VH+ZwnZsKwZYbFDB7fcXDzHP5aHB+nosnr8ZgKc4Bqk48GibQb/jC2+VN+D8XrJYF1aPDhrFZ8azjSkdsKnNYsxq1Ig/pIEb4GQ= 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 8D41F22EE; Tue, 7 Oct 2025 21:21:23 -0700 (PDT) Received: from ergosum.cambridge.arm.com (ergosum.cambridge.arm.com [10.1.196.45]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id AA2BC3F738; Tue, 7 Oct 2025 21:21:30 -0700 (PDT) From: Anshuman Khandual To: linux-kernel@vger.kernel.org Cc: Anshuman Khandual , Dimitri Sivanich , Arnd Bergmann , Greg Kroah-Hartman Subject: [PATCH] drivers/sgi-gru: Use pxdp_get() for page table access Date: Wed, 8 Oct 2025 05:21:26 +0100 Message-Id: <20251008042126.2408106-1-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.30.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace all READ_ONCE() with a standard page table accessors i.e pxdp_get() that default into READ_ONCE() in cases where platforms do not override. Cc: Dimitri Sivanich Cc: Arnd Bergmann Cc: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- drivers/misc/sgi-gru/grufault.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufaul= t.c index 3557d78ee47a..60e55facd8d7 100644 --- a/drivers/misc/sgi-gru/grufault.c +++ b/drivers/misc/sgi-gru/grufault.c @@ -212,19 +212,19 @@ static int atomic_pte_lookup(struct vm_area_struct *v= ma, unsigned long vaddr, pte_t pte; =20 pgdp =3D pgd_offset(vma->vm_mm, vaddr); - if (unlikely(pgd_none(*pgdp))) + if (unlikely(pgd_none(pgdp_get(pgdp)))) goto err; =20 p4dp =3D p4d_offset(pgdp, vaddr); - if (unlikely(p4d_none(*p4dp))) + if (unlikely(p4d_none(p4dp_get(p4dp)))) goto err; =20 pudp =3D pud_offset(p4dp, vaddr); - if (unlikely(pud_none(*pudp))) + if (unlikely(pud_none(pudp_get(pudp)))) goto err; =20 pmdp =3D pmd_offset(pudp, vaddr); - if (unlikely(pmd_none(*pmdp))) + if (unlikely(pmd_none(pmdp_get(pmdp)))) goto err; #ifdef CONFIG_X86_64 if (unlikely(pmd_leaf(*pmdp))) --=20 2.30.2