From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751332AbeDDRsk (ORCPT ); Wed, 4 Apr 2018 13:48:40 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:58382 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750915AbeDDRsi (ORCPT ); Wed, 4 Apr 2018 13:48:38 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 783626024C Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=okaya@codeaurora.org Subject: Re: [PATCH v2 2/2] io: prevent compiler reordering on the default readX() implementation To: Arnd Bergmann Cc: Palmer Dabbelt , Mark Rutland , Timur Tabi , sulrich@codeaurora.org, linux-arm-msm@vger.kernel.org, Linux ARM , linux-arch , Linux Kernel Mailing List References: <691b903c-e97d-0a25-28c5-690318bb215a@codeaurora.org> From: Sinan Kaya Message-ID: <9b0d7db3-0830-9661-6dc8-39523daa8f32@codeaurora.org> Date: Wed, 4 Apr 2018 13:48:35 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 4/4/2018 11:55 AM, Arnd Bergmann wrote: > Yes, exactly, plus the same for write and in/out of course. I was looking at this... inb() and outb() seem to be calling writeb(). It gets the wmb/barrier automatically when we fix writeb(). Did I miss something? -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.