From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 398C0C77B7C for ; Wed, 25 Jun 2025 02:56:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 8AEF56B009C; Tue, 24 Jun 2025 22:56:02 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 85F6E6B009E; Tue, 24 Jun 2025 22:56:02 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7270A6B00B0; Tue, 24 Jun 2025 22:56:02 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 5D6406B009C for ; Tue, 24 Jun 2025 22:56:02 -0400 (EDT) Received: from smtpin24.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id DABF35F85C for ; Wed, 25 Jun 2025 02:56:01 +0000 (UTC) X-FDA: 83592408522.24.765A9CF Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf05.hostedemail.com (Postfix) with ESMTP id 9BF71100009 for ; Wed, 25 Jun 2025 02:55:59 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf05.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1750820160; a=rsa-sha256; cv=none; b=HzwceG2774X/oOjoL5TGcGfInlbXTEwoUt1C+C1Iodp3KJwk3p2dCMY9QS5ic0nreNiAfm r3wgXfM7X5MOqvyBOdPsgXwcK9hH9RpKEw1kcEo3VauuPIPh0EXuNdBn5O0TgQyUqMLVz2 jyAZH+4T116wDwV3J17AINBLa7XYdW4= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf05.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1750820160; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=U4nww4WL9T32a7ZYJHYVCUEcWr1E4iYoP8eQnSaP0s0=; b=eple3bnEm5ZEaBdsFIv9po/hDm91J9p9ivfrboysnTWgo0/qyDF8HCeqxHTqFIubdv41Tq lgTCzuxmkjhVvfmh4BHmxGHZBKD4tLR0B+nAwITjGYaQesBVDbFlinBxRbkvCTfODH9Eyl 6Uq8YGZ07IzcMcx0X2IEcUGJmYRj7ec= 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 487D6113E; Tue, 24 Jun 2025 19:55:40 -0700 (PDT) Received: from [10.164.146.16] (J09HK2D2RT.blr.arm.com [10.164.146.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4F6A63F58B; Tue, 24 Jun 2025 19:55:38 -0700 (PDT) Message-ID: <46432a2e-1a9d-44f7-aa09-689d6e2a022a@arm.com> Date: Wed, 25 Jun 2025 08:25:35 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/3] use vm_flags_t consistently To: Lorenzo Stoakes , Andrew Morton Cc: Russell King , Catalin Marinas , Will Deacon , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , "David S . Miller" , Andreas Larsson , Jarkko Sakkinen , Dave Hansen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Alexander Viro , Christian Brauner , Jan Kara , Kees Cook , Peter Xu , David Hildenbrand , Zi Yan , Baolin Wang , "Liam R . Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Xu Xin , Chengming Zhou , Hugh Dickins , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Rik van Riel , Harry Yoo , Dan Williams , Matthew Wilcox , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jason Gunthorpe , John Hubbard , Muchun Song , Oscar Salvador , Jann Horn , Pedro Falcato , Johannes Weiner , Qi Zheng , Shakeel Butt , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, sparclinux@vger.kernel.org, linux-sgx@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, nvdimm@lists.linux.dev, linux-trace-kernel@vger.kernel.org References: Content-Language: en-US From: Anshuman Khandual In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 9BF71100009 X-Rspamd-Server: rspam10 X-Stat-Signature: h8k666m6uomakqeqxsffrwhtaz17y59k X-HE-Tag: 1750820159-194553 X-HE-Meta: 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 JLt49nIi rAGl/NlQ665At3D+rfzk5JsQNui5W63+2KCZW91PuNicJpalDHRuBaotdUQzPBtPLoTWR+EzJD2yq5njho61TRkDYBqSADjwjis5kgfBi2Z0SSHEInEbijlXe606xsfMX1rqvNqQMoE29jVVc/Pg424PDVevfsTAfORLo0piGnsC13kGUZEKQo/33lDH6JUXahcEI+T2hoZkuufI+lk/7DbJSPtasmjRnjatlTbif/DgNKyPZksMSfiHp/A== 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: On 19/06/25 1:12 AM, Lorenzo Stoakes wrote: > The VMA flags field vma->vm_flags is of type vm_flags_t. Right now this is > exactly equivalent to unsigned long, but it should not be assumed to be. > > Much code that references vma->vm_flags already correctly uses vm_flags_t, > but a fairly large chunk of code simply uses unsigned long and assumes that > the two are equivalent. > > This series corrects that and has us use vm_flags_t consistently. > > This series is motivated by the desire to, in a future series, adjust > vm_flags_t to be a u64 regardless of whether the kernel is 32-bit or 64-bit > in order to deal with the VMA flag exhaustion issue and avoid all the > various problems that arise from it (being unable to use certain features > in 32-bit, being unable to add new flags except for 64-bit, etc.) > > This is therefore a critical first step towards that goal. At any rate, > using the correct type is of value regardless. > > We additionally take the opportunity to refer to VMA flags as vm_flags > where possible to make clear what we're referring to. > > Overall, this series does not introduce any functional change. > > Lorenzo Stoakes (3): > mm: change vm_get_page_prot() to accept vm_flags_t argument > mm: update core kernel code to use vm_flags_t consistently > mm: update architecture and driver code to use vm_flags_t Hello Lorenzo, Just wondering which tree-branch this series applies ? Tried all the usual ones but could not apply the series cleanly. v6.16-rc3 next-20250624 mm-stable mm-unstable b4 am cover.1750274467.git.lorenzo.stoakes@oracle.com git am ./20250618_lorenzo_stoakes_use_vm_flags_t_consistently.mbx - Anshuman