Received: by 2002:a5b:505:0:0:0:0:0 with SMTP id o5csp1930912ybp; Sat, 12 Oct 2019 00:36:31 -0700 (PDT) X-Google-Smtp-Source: APXvYqxyIIshTonKpPCPFUAbMWhPoMVYoeS8UMZrLuDABho3SN1IVWB0Cz88Asi4Czeg7piQ1EdU X-Received: by 2002:aa7:d687:: with SMTP id d7mr17736336edr.143.1570865791484; Sat, 12 Oct 2019 00:36:31 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1570865791; cv=none; d=google.com; s=arc-20160816; b=SYyG27k/bmiB63B3tVINiJc18SScBsyJAyH9SH5y6zm8Va6PY3Lg6fpnSMlQ5kh7sb XI88CFD+rjBKXT/dq5fOsWO03eIOY31jzp3fJ6vMEHzVPCph+MVoYZpQrBiXJql+26Ub sEuf9OvvNKK4oxkc+IHU1XGjuHfyxcLF4AQwSK65GVBP3sLNxCeKmOI6lqoJ8rPOojPD MMuw4VNbpRgsFlnDY1/REX+25O8mxJ4E0Z0Wps7l0svqBGtuXKK4BLmmOzVz3jUIIqR7 B1DxkgKSrXvTPuMEYeM1BY2DGx5DgNTwx2qzkBQdEW4AzNHZ2/634oG1XUju2QzTiyfQ 0EFA== 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 :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:cc:to:subject; bh=pMRszoOT4vP2FLBw/qy6KmOLnLMWkVPGkHbrXqZvq74=; b=D22s+WQkugprjaJ3KFlb7dtJJgGzXXT5Btab8PtIHFuGkTKL6Ww7cbHv9ljaEknVjs RQEWMH7uxB9bC9ClFC0tB0k/Hd8V9uqHdHtkuegvTVnP4mjTCtjNrQ5/3DnbSC1Rodeq A4Ot3cTfpftfI35536LjsyBZzcKXnn493Lmb45kgvIynM33ZXOxBXGzCHGIkFc4th7RD 6fezXxwjxtnaSOMhiFwmI7Ic3fU+giDbyLt4i6htTcvDPdK6rbNLdABTDN3IqdmlIOKj vfKIeWHawje/F/7wGJfbnRBrx1r42KojVLgnjYFB9J2DCmnel3U/Q28qvDffFtDf20VE JhvA== ARC-Authentication-Results: i=1; mx.google.com; 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 g15si6921629edm.349.2019.10.12.00.36.08; Sat, 12 Oct 2019 00:36:31 -0700 (PDT) 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; 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 S1728536AbfJLHd6 (ORCPT + 99 others); Sat, 12 Oct 2019 03:33:58 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:3701 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727014AbfJLHd6 (ORCPT ); Sat, 12 Oct 2019 03:33:58 -0400 Received: from DGGEMS412-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id AEF6B6C2B173B91EFB2B; Sat, 12 Oct 2019 15:33:54 +0800 (CST) Received: from [127.0.0.1] (10.177.223.23) by DGGEMS412-HUB.china.huawei.com (10.3.19.212) with Microsoft SMTP Server id 14.3.439.0; Sat, 12 Oct 2019 15:33:42 +0800 Subject: Re: [PATCH 3/3] arm64: configs: unset CPU_BIG_ENDIAN To: Will Deacon , Arnd Bergmann CC: Anders Roxell , Catalin Marinas , John Garry , "Linux Kernel Mailing List" , Olof Johansson , Linux ARM References: <20190926193030.5843-1-anders.roxell@linaro.org> <20190926193030.5843-5-anders.roxell@linaro.org> <20191011102747.lpbaur2e4nqyf7sw@willie-the-truck> From: Hanjun Guo Message-ID: <73701e9f-bee1-7ae8-2277-7a3576171cd4@huawei.com> Date: Sat, 12 Oct 2019 15:33:37 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 In-Reply-To: <20191011102747.lpbaur2e4nqyf7sw@willie-the-truck> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.223.23] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019/10/11 18:27, Will Deacon wrote: [...] > > Does anybody use BIG_ENDIAN? If we're not even building it then maybe we > should get rid of it altogether on arm64. I don't know of any supported > userspace that supports it or any CPUs that are unable to run little-endian > binaries. FWIW, massive telecommunication products (based on ARM64) form Huawei are using BIG_ENDIAN, and will use BIG_ENDIAN in the near future as well. Thanks Hanjun