Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp1803771imu; Fri, 14 Dec 2018 00:26:32 -0800 (PST) X-Google-Smtp-Source: AFSGD/WFFNnU661KzEcAYYk41MlEINcascDUpnHmaZ5QY5kVaelm0HTwmTsAyXdulEwC++AJ4H43 X-Received: by 2002:a17:902:108a:: with SMTP id c10mr2038116pla.131.1544775992930; Fri, 14 Dec 2018 00:26:32 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1544775992; cv=none; d=google.com; s=arc-20160816; b=cdK/3WaN3c+lpTXgQg/YUnH/EzbvH7+SofXcvN4m0BqQztadq2gS2P0LIiTVa/Q42K QPu7PM/XQF3VwtTR9vrWa9mXEBjcRFhi/p+/B1+72XXXSiLaDGYi+kcraW2W4JNWG3MT iKCkIYEzNUAwuv0LcMt64NR7Lys+q7FGjMOpiLmHTsx8jl2k8Y6VKpuxFeQ8HvSimb47 JulkgZkxcgnqfP9d7oeDMZtVcPV2UVOlHhk/bv2xKUv1TNKxYv8Nbag+aeBSYZWfxIny 7flQXE5NpOwfcwwUeyJ+ASJfn/p888wy1drutDdPa4FJu8mXXp10e/adk4r0ozLWNlvv apLA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=jE5kVpdlADftxEtvgMXzvTMgshsdiNRl9dZj1a7poJs=; b=LhLRV9cSwM3pc1qGv3eyJppHPssQ19vcYcLYqpmkkuIXnfZTlQyJyVj3dxXTf/hSNK IOPvOMC+bEiDOfWdTTgYJi9Xg7t+x6bwsdhRYSxrVY7T5MqyQztOFwS9pJ0hjoy5G7/h C/R3OGBJIa24FzwLgkGQvQyEg6WdNhvBYZQWco/wuTYD8tseb8QjPK6rkjpXgSjkJ5Tf fjKx6um2qfdTxnCCS10uqe3x6GS+Mro5Tw+GNp3cxP228jfW5uCVsmOd1EuNnMv8lgHw WOOhuMaC6imOhZD924rFN5rkTscruQQT3e2FS/6mL7CQDGSY6BsviHgDhmCLBkTwBVxt WFQw== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=XsgLx6nz; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id m30si3899312pff.158.2018.12.14.00.26.17; Fri, 14 Dec 2018 00:26:32 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=XsgLx6nz; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727949AbeLNIZW (ORCPT + 99 others); Fri, 14 Dec 2018 03:25:22 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:47584 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726533AbeLNIZV (ORCPT ); Fri, 14 Dec 2018 03:25:21 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=jE5kVpdlADftxEtvgMXzvTMgshsdiNRl9dZj1a7poJs=; b=XsgLx6nz6TJ8u0MUvX4EHrOUf yhIMJf4w/JUDi7NtOT4PsVvlH7JlKPqrfzA+alKjbmM9vKqSzVMfAAzq6yizJvLcXM9mJ5BlAtAv/ tv4elxRLTowl3HS3G709WDZpVJqRH9v+yfl7Zpj2L/Jat1Zkj8ROZlhe3BTybedqxdztOq+jLCeAu c9TUYDPeK3kQZvMer2DkRHyrtLo8Dp37iKT7JIqGcgLNd7joDCDpfudSHE74H1sABgKQh7feu9E5b 4QeFS58zw/0l3pkYUOrC4jTvfeRYA/rgC9KeC4R+FwR/jG1NnQ+ESFNKp8tfY7znRk+JfFre8EVqG TpQHWVo2w==; Received: from 089144198147.atnat0007.highway.a1.net ([89.144.198.147] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gXimb-0004l7-RB; Fri, 14 Dec 2018 08:25:18 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Cc: Michal Simek , Ashutosh Dixit , linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-m68k@lists.linux-m68k.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-kernel@vger.kernel.org Subject: ensure dma_alloc_coherent always returns zeroed memory Date: Fri, 14 Dec 2018 09:25:13 +0100 Message-Id: <20181214082515.14835-1-hch@lst.de> X-Mailer: git-send-email 2.19.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For security reasons we already returned zeroed memory from dma_alloc_coherent on most common platforms, but some implementation missed out. Make sure we provide a consistent behavior.