From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Koenig, Christian" <Christian.Koenig@amd.com>
Subject: Re: [RFC PATCH] drm/ttm: force cached mappings for system RAM on ARM
Date: Thu, 10 Jan 2019 08:36:52 +0000
Message-ID: <1ef4c460-9f11-3894-712f-b19b67287c4b@amd.com>
References: <20190110072841.3283-1-ard.biesheuvel@linaro.org>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <dri-devel-bounces@lists.freedesktop.org>
Received: from NAM04-SN1-obe.outbound.protection.outlook.com
 (mail-eopbgr700067.outbound.protection.outlook.com [40.107.70.67])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 9441F6ED76
 for <dri-devel@lists.freedesktop.org>; Thu, 10 Jan 2019 08:36:54 +0000 (UTC)
In-Reply-To: <20190110072841.3283-1-ard.biesheuvel@linaro.org>
Content-Language: en-US
Content-ID: <410D8B22E2614F46A9833CB4D8DDB197@namprd12.prod.outlook.com>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: "Carsten.Haitzler@arm.com" <Carsten.Haitzler@arm.com>, David Airlie <airlied@linux.ie>, "will.deacon@arm.com" <will.deacon@arm.com>, "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>, "Huang,
 Ray" <Ray.Huang@amd.com>, "Zhang, Jerry" <Jerry.Zhang@amd.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "Bernhard.Rosenkranzer@linaro.org" <Bernhard.Rosenkranzer@linaro.org>
List-Id: dri-devel@lists.freedesktop.org
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=