Received: by 2002:ac0:a5a7:0:0:0:0:0 with SMTP id m36-v6csp3122016imm; Mon, 16 Jul 2018 22:29:58 -0700 (PDT) X-Google-Smtp-Source: AAOMgpcAHzqMxEqVnjut0EP9lLRMiXZOA3UJTXy3YesilnFOnKKhFDdql9UUH2SahLpy5oJdzu5b X-Received: by 2002:a63:943:: with SMTP id 64-v6mr177829pgj.368.1531805398276; Mon, 16 Jul 2018 22:29:58 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1531805398; cv=none; d=google.com; s=arc-20160816; b=a+lABemeLkN8m0CUfOUIfx2/E0BHqiAq3KlSsrVDB8kDJ/ferMcGfq8JA94ro2L/zI AMQdMC8kG1B39Ju8/avjeBYhMz9OyEqp7Nk1pt0j7SmJQzM8NGO7ZCftSP8bYFIAbeTU S5qP2qXsSgYWpKtaCsJTy/G9LKCW6lMrqVyun8LFjCtKV+tLQbWhtv0Nlo7oRvAjYzxp Rc7QYIIcwF78YkmPlAQd2BOkZu3M1p2h48Hg/kluwU+W069vCxVgh/2eEWdABrUd2VQx Uci4M02bWpUBRmy0PuYxF3FxwGQRdgPLtfFU+b3k+6RPMmZUHb4Woh+HI3zJJhW8PG8F z29w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:arc-authentication-results; bh=V2ecMVezGITViMoAiLi6F/Ojp9sW27j5dOYZyoCWz44=; b=utjTxWUZksBjZr9cxg+sH+p89IBzPLgZLufhDqHoew4NGPkxbIWvGokm6HkNCDZk3X rVZmcnwTMiUgPFHiKbtQSBXyaV9wQHlgweaAcHfPwpuGvVZ2GrQlCHPH0gkmNgkN3i/W 3HVTAj7kCnllC77BQHoZsjPNtcP/Av1cv1Y1cbadDaUMIUSFT9PMeEt9mLKeW5zcRl13 1jOy6o49U1XXYPNuqR0xtrSWR3ehrYxR8811YpVpDe1AVK+oYucWLtPKZVcyotHVK91f aCO46BzeZNSzlVuxzDRwLesCms3eQmwCpDtw7ozEGMYlAok3jEvO2iKRWFwrO05ZuEOQ RZUw== 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 r59-v6si69961plb.187.2018.07.16.22.29.43; Mon, 16 Jul 2018 22:29:58 -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 S1728103AbeGQF7m (ORCPT + 99 others); Tue, 17 Jul 2018 01:59:42 -0400 Received: from mx2.suse.de ([195.135.220.15]:41316 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727350AbeGQF7m (ORCPT ); Tue, 17 Jul 2018 01:59:42 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 2AC37AD71; Tue, 17 Jul 2018 05:28:54 +0000 (UTC) Date: Mon, 16 Jul 2018 22:28:50 -0700 From: Davidlohr Bueso To: akpm@linux-foundation.org Cc: manfred@colorfullife.com, linux-kernel@vger.kernel.org, Davidlohr Bueso Subject: Re: [PATCH -next] ipc/sem: prevent queue.status tearing in semop Message-ID: <20180717052850.62vaf4pi5yibtu5j@linux-r8p5> References: <20180717052654.676-1-dave@stgolabs.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20180717052654.676-1-dave@stgolabs.net> User-Agent: NeoMutt/20170912 (1.9.0) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 16 Jul 2018, Bueso wrote: >In order for load/store tearing to work, _all_ accesses to ^ prevention