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]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 10B3ACCD187 for ; Thu, 9 Oct 2025 11:36:08 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3D25D8E0036; Thu, 9 Oct 2025 07:36:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3830F8E0002; Thu, 9 Oct 2025 07:36:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 299278E0036; Thu, 9 Oct 2025 07:36:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 14AB18E0002 for ; Thu, 9 Oct 2025 07:36:08 -0400 (EDT) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 79A4711AFE7 for ; Thu, 9 Oct 2025 11:36:07 +0000 (UTC) X-FDA: 83978371974.17.BF893CA Received: from out-182.mta0.migadu.com (out-182.mta0.migadu.com [91.218.175.182]) by imf23.hostedemail.com (Postfix) with ESMTP id 52230140007 for ; Thu, 9 Oct 2025 11:36:05 +0000 (UTC) Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=lLWLBamo; spf=pass (imf23.hostedemail.com: domain of lance.yang@linux.dev designates 91.218.175.182 as permitted sender) smtp.mailfrom=lance.yang@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1760009765; 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:dkim-signature; bh=V5FQj+qs6DmW6o9C6/UxAhR39wjcn7nWtLY34WIZgGw=; b=kSy/OqUM+opIbm/XpT+OCQhfkQrEJevFquPg2meXxazNSEM37niymsOu0qdXXM2xRJpA+w fZu04MCrNJJxdzXXundAVh0k9ONF5cjoftwpCaPAuaLZs230UGPqIMiqsErtotaEekuhzw F51w8jiAfxvpPOZLyMIuWYjWsIJKxh0= ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=lLWLBamo; spf=pass (imf23.hostedemail.com: domain of lance.yang@linux.dev designates 91.218.175.182 as permitted sender) smtp.mailfrom=lance.yang@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1760009765; a=rsa-sha256; cv=none; b=cLSImKQ0xI0HPiTqjUvpX+VtxEEptVHFVf4S8z5+3YAk3sJ5zE8HLYc0nDl8PnqUd0GhNu KQOrqfIah7MMFWTmVdYqDoMIy9arFwSXf5RIwe7TyTjwQasT5zUSbU+WHTFY0w0tsz1koW G8/Qa0fCUbxGZn2jdMo4bDLbodY5nBs= X-Gm-Message-State: AOJu0Ywiz0N60tuu1RZiKs75RYwTLBBiJhO48AS6D07QOKwQNhVCP+bI ULH2CCt+3NmyNCoAudLix/yNsVZNeL98W/eJ1UcNjfN2WYB4QbhoDMsJQYrC87O2Xka19CHNT0C N3lduwfPV3iAtisTA7/eaWs8GPFPOceM= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1760009763; h=from:from: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=V5FQj+qs6DmW6o9C6/UxAhR39wjcn7nWtLY34WIZgGw=; b=lLWLBamoZ9Vze3bbffxc2NqDZEkTkmP5NueaLuRLtDk6TDt6G0WH/OCkcluwDVjtDzhbu9 EnucY5dxtbCFT9qoGLojckSegsaErZzsjCuDeonorqG51W6AIjVVoGGjxFgMmgrzuYD07l rzomPzGOmXyhJTfOi/yfr74DarXFxD8= X-Google-Smtp-Source: AGHT+IEn6DfUJzTF+qrN0U8A3hpm9iF5aoWwXO0T2nuUH9Z0DtFZJPr2qGDgZztcydKq4KsrmSpqANEY2EpX+r8m+YY= X-Received: by 2002:a0c:f701:0:b0:87b:b6ad:e647 with SMTP id 6a1803df08f44-87bb6ade751mr19703066d6.6.1760009759425; Thu, 09 Oct 2025 04:35:59 -0700 (PDT) MIME-Version: 1.0 References: <20251007063100.2396936-1-anshuman.khandual@arm.com> In-Reply-To: <20251007063100.2396936-1-anshuman.khandual@arm.com> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Lance Yang Date: Thu, 9 Oct 2025 19:35:22 +0800 X-Gmail-Original-Message-ID: X-Gm-Features: AS18NWBdt3Xvr1mjG1xmHMEbEeTM17-hxQa2VvgahlWoWMB1DxgCulMHrUr3oNU Message-ID: Subject: Re: [PATCH] mm: Replace READ_ONCE() with standard page table accessors To: Anshuman Khandual Cc: linux-mm@kvack.org, Andrew Morton , David Hildenbrand , linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 52230140007 X-Stat-Signature: qgzf75ngct59145kdrq5hjkycfyt34wd X-Rspam-User: X-HE-Tag: 1760009765-175520 X-HE-Meta: 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 JUpGSUEn Hd1MJMb+Uekg5daY4T2GJTJ7HKPBHDlvxNtEQw0YOz1CadGHjHmxq4IUlisXh1D70Wrc8pEhIxXq2r343MjSmiSxqYnUf1nKP8wl1LIDqDqlztkoTjSlrqk2/1FksXKDY83DqGFufyaddgKLmemRDfOR/IJBXx82gL//c9jWP4Dqa/bIHAzEfJfujlaVAT4NBFLPeZGAV17C+TZCOhBf4x0wzDoh5eCHWToYPyIb3MaQX1YB4KDTRIavqSFxjAL4TnuzqysEXDdNfs7x0wPKP6UHDudVPmRxi13mUTvGKCaDZjaQHbwhuubtdmGluxnxOZ+3rnh9vUNPGHsDSox9iYW6eHph6pdwKA//Uv0zEgTFDe8GqBEjfB11Hj+obrreqM/dUQ/HWPFR9VErzdXLQpNcvsGca22RowVKauqoBeIuWJoWXw3fQbAHuMQ== 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 Tue, Oct 7, 2025 at 2:31=E2=80=AFPM Anshuman Khandual wrote: > > Replace all READ_ONCE() with a standard page table accessors i.e pxdp_get= () > that defaults into READ_ONCE() in cases where platform does not override. > > Cc: Andrew Morton > Cc: David Hildenbrand > Cc: linux-mm@kvack.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Anshuman Khandual > --- LGTM. I still assume it is a no-op change :) Reviewed-by: Lance Yang