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 5388947FB1E; Wed, 2 Sep 2026 11:56:51 +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=1788350222; cv=none; b=qDKEFmwAJJCZscn07Owry2jY3aEXd2GikNWnq4DgiayDiDQmu7IXLHXrC/VE2mYICpXM3ZjaSKKjjvcGkOpAfiAyWmmRqvO/qQHia8wG8pK1B8wB1OUTioczfNYaQj2fyzxgPocYL2mvDVoXwfXu5I1VstWeBRnWDFYT92xpwSU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788350222; c=relaxed/simple; bh=a5z3VgCuV82F6RPeAfMv4Cs88UUw7cEiZjrKWSyb5gM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=MR4mAkTOleIrxUsFdOPcbhnaBbAQIzVPXhxo3vJl9oj8ms+gNgsua2dcJxy8UxbWoepip/HlTSpDsFvMhicsB2uA65Zh3ucs/Ds3Ubvcx9E5niqW4xMvS8iKY3BQ6bVCMUQlADzio/Csr7PocpPiD8t92eeCggFm5hUIgzZ3qyM= 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; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=JWpWS3ff; 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 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="JWpWS3ff" 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 AAB7F1E32; Wed, 2 Sep 2026 04:56:39 -0700 (PDT) Received: from e129823.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 511A93F85F; Wed, 2 Sep 2026 04:56:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1788350203; bh=a5z3VgCuV82F6RPeAfMv4Cs88UUw7cEiZjrKWSyb5gM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=JWpWS3ffE1GLLis9po+Yz/mdLIadyKedxJ5+vnCEOzxzDhXnh6pni34o9WA3lPaY3 8YN4snZQJKN3Yzki8gEyuot6J5purDrlO7D076nrar2h0BRSWrEd+IKOfPbM2DjdVf C07c/tMLjlLEZskvetTLzowjaVa4wJ6vh1NpkUUc= From: Yeoreum Yun Date: Wed, 02 Sep 2026 12:56:03 +0100 Subject: [PATCH RFC v3 01/21] ARM: mm: make nommu pgd_t a scalar Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260902-dummy_ptxp3-v3-1-5d8f5b17c25c@arm.com> References: <20260902-dummy_ptxp3-v3-0-5d8f5b17c25c@arm.com> In-Reply-To: <20260902-dummy_ptxp3-v3-0-5d8f5b17c25c@arm.com> To: Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Catalin Marinas , Will Deacon , Arnd Bergmann , Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Johannes Weiner , David Hildenbrand , Michal Hocko , Lorenzo Stoakes , Tianrui Zhao , Bibo Mao , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonas Bonn , Stefan Kristiansson , Stafford Horne Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-openrisc@vger.kernel.org X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1079; i=yeoreum.yun@arm.com; h=from:subject:message-id; bh=yuk3S4RfznnTM9UkPeDtkv8dyVxIm22Z2ipCHlRDCbc=; b=owEB7QES/pANAwAKAW3Vw9FaxTEzAcsmYgBqmA7idg6lSNQrEggQ4WH6Gwya5B5f1/qCND8aE jNsah22k92JAbMEAAEKAB0WIQQtg+CS3QUzuFh1pJ1t1cPRWsUxMwUCapgO4gAKCRBt1cPRWsUx M55BDACPu7Y6d+irL9cNnQwbHZMHkOrav9grp6zTgOsqQGAkkTBo7L2FFa0BeFXUyxp8SnK6hTV pltmcJWh2UV8lHAWMJVNmBSoFxKABbZ9m8XUqhLr+MDF5GUzkzGjgE5bSZHsTHg3sTFNnrWOqLM t6BAGepWC81BIRIjXzyJ2mZ3nZT/JgD8LZcNrSbGHdYnTQTepcdZmzhnoyimCOg99vs+8L3r2fW 1VClNEqJS2ceT73Hq6m+JDHPWRdSzaONSKJBA/eJgzMe4GJgyEHi/3jgaVAeChVBhJznjucUMlx Ctmk4MhHoQDs+cJQD+cBseLnlWTZObzMPF2boQvkQJcACt/xdHAj9/1Qxpdv92bznvMpJpgY8i2 SsRO65VvkR3Noc63S6LyyXsfSSojY+ZlBv4nXOOBEzY76T2rC3NdKLBGN9Ir5YK8Qni76UOhW1o 2LO5bQUuEe+C1ZjHBi7KB2s4NUJ2IfWaKqpVdrd6w14DRusXbtpkm3DQ6MMJrXbwyFOOY= X-Developer-Key: i=yeoreum.yun@arm.com; a=openpgp; fpr=2D83E092DD0533B85875A49D6DD5C3D15AC53133 From: "David Hildenbrand (Arm)" As pgd_t is returned from a function, like pgdp_get(). pgd_t shouldn't be an array. There is no need to match the actual arm page tables, because with nommu there are no page tables. It's all just in place to make the compiler happy. Making it a scalar will make the compiler happy. So let's just use an u32. Signed-off-by: David Hildenbrand (Arm) --- arch/arm/include/asm/page-nommu.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/include/asm/page-nommu.h b/arch/arm/include/asm/page-nommu.h index e74415c959be..88659b38e236 100644 --- a/arch/arm/include/asm/page-nommu.h +++ b/arch/arm/include/asm/page-nommu.h @@ -18,12 +18,12 @@ */ typedef unsigned long pte_t; typedef unsigned long pmd_t; -typedef unsigned long pgd_t[2]; +typedef unsigned long pgd_t; typedef unsigned long pgprot_t; #define pte_val(x) (x) #define pmd_val(x) (x) -#define pgd_val(x) ((x)[0]) +#define pgd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) -- 2.43.0