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 174C8C2BA4C for ; Wed, 26 Jan 2022 10:07:38 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A66D56B0074; Wed, 26 Jan 2022 05:07:37 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A16536B0075; Wed, 26 Jan 2022 05:07:37 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 905926B0078; Wed, 26 Jan 2022 05:07:37 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0251.hostedemail.com [216.40.44.251]) by kanga.kvack.org (Postfix) with ESMTP id 8129B6B0074 for ; Wed, 26 Jan 2022 05:07:37 -0500 (EST) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 3D6A78CA2E for ; Wed, 26 Jan 2022 10:07:37 +0000 (UTC) X-FDA: 79072011354.17.E88223D Received: from mail-yb1-f172.google.com (mail-yb1-f172.google.com [209.85.219.172]) by imf01.hostedemail.com (Postfix) with ESMTP id 4293F40004 for ; Wed, 26 Jan 2022 10:07:36 +0000 (UTC) Received: by mail-yb1-f172.google.com with SMTP id h14so69753050ybe.12 for ; Wed, 26 Jan 2022 02:07:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=ED6xZ1aoXJLSNfOfycmDD/UZTD6F5UIAxuxHbpSpO6Q=; b=29I8vvPUfluAh9iwV5m8myx1+C7m9ajFGFE19XAriSAkpfiJG8aOONviW2Tq9FoVsg rdPVJrXJvs4VW8a2NYmumWTuO50FcQNS8cW5Pm+drWEbG1vrrBtd7UAh8ln01y/cola9 F4hNMSc1/MZuc/RP509LmeT0mohQDqePglw7fRILTJiJzSzan6IaxJDH7gwikhjB491n T9/2C3ITf75ql0AN8yQnZjJFho4FC0UV5IK5uMxTLTaTFue7R+Fas3JGvDBF3VvRQVY7 sJWs4+zaKmJi2BRrJcG0diL7jZoecNSQ/5jLLHAtgUAz4KQEMBcjzUVQPv+GB9PyecaC q0Fw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=ED6xZ1aoXJLSNfOfycmDD/UZTD6F5UIAxuxHbpSpO6Q=; b=u+ZDUVp3eQcA9qzhzccYGTmBFoMCaUHAX1ez4276QG5xDvYsYZQRY83fm/TRsUudod yzb3dEcfg7+cjbKcOd+2P9eV/LhA1F/67AHmG9Y3W+lhNTUbq6QTxeq7F4vkexf9J7Qx JDLoWPzNVY0uNnuYJT8aHQL5DAfr8I/2qva0TK0OZCnP130nwJEdxFEU6oUuhF06H2ps AKJOFo98NLiJSmnVS2yXLKDmKMgpw3ksITSSXrXQpoHJiSsyDEvIvaN/7NiApUIVUw6N 2BmMmsOlUDtGrg9321Y9J9jXO7iXCvjErwWDRHI9Vu8g985E7rKnJ5ec8cyrFbsNfvrH u1FA== X-Gm-Message-State: AOAM531YVeESUzvCQY2wv+iY+XLM55oZ9p2RrbKtXlDCwz5Z+JzUmUCt NAgjDMwxVXdUJj/L/I2e1qsQYYYj1gQXGhjEIt08Vg== X-Google-Smtp-Source: ABdhPJyfMVEZZMn31mQKRhAO/W9jLqL75cv+COKEH+X2Yy1NeA/UZ0HSfnCkyye8kkUiZLgfDHl70Tb4BAnAuStHKmg= X-Received: by 2002:a05:6902:100c:: with SMTP id w12mr20989024ybt.317.1643191655612; Wed, 26 Jan 2022 02:07:35 -0800 (PST) MIME-Version: 1.0 References: <20220126092602.1425-1-linmiaohe@huawei.com> In-Reply-To: <20220126092602.1425-1-linmiaohe@huawei.com> From: Muchun Song Date: Wed, 26 Jan 2022 18:06:59 +0800 Message-ID: Subject: Re: [PATCH] mm/memremap: avoid calling kasan_remove_zero_shadow() for device private memory To: Miaohe Lin Cc: Andrew Morton , Linux Memory Management List , LKML Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 4293F40004 X-Stat-Signature: wqofffdhpmtwupesyf68oso7mqz7qjns X-Rspam-User: nil Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=29I8vvPU; spf=pass (imf01.hostedemail.com: domain of songmuchun@bytedance.com designates 209.85.219.172 as permitted sender) smtp.mailfrom=songmuchun@bytedance.com; dmarc=pass (policy=none) header.from=bytedance.com X-HE-Tag: 1643191656-259390 X-Bogosity: Ham, tests=bogofilter, spamicity=0.003682, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Jan 26, 2022 at 5:27 PM Miaohe Lin wrote: > > For device private memory, we do not create a linear mapping for the memory > because the device memory is un-accessible. Thus we do not add kasan zero > shadow for it. So it's unnecessary to do kasan_remove_zero_shadow() for it. > > Signed-off-by: Miaohe Lin Good catch. Reviewed-by: Muchun Song