From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-patches-return-447668-listarch-gcc-patches=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 65133 invoked by alias); 1 Feb 2017 17:26:09 -0000
Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-patches.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>
List-Post: <mailto:gcc-patches@gcc.gnu.org>
List-Help: <mailto:gcc-patches-help@gcc.gnu.org>
Sender: gcc-patches-owner@gcc.gnu.org
Received: (qmail 65123 invoked by uid 89); 1 Feb 2017 17:26:08 -0000
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD,SPF_HELO_PASS autolearn=ham version=3.3.2 spammy=H*f:sk:1485802, H*i:sk:1485802, H*MI:sk:1485802
X-HELO: mx1.redhat.com
Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Wed, 01 Feb 2017 17:26:08 +0000
Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26])	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))	(No client certificate requested)	by mx1.redhat.com (Postfix) with ESMTPS id CD5D9C04BD26;	Wed,  1 Feb 2017 17:26:07 +0000 (UTC)
Received: from ovpn-117-112.ams2.redhat.com (ovpn-117-112.ams2.redhat.com [10.36.117.112])	by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v11HQ40H031606	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO);	Wed, 1 Feb 2017 12:26:06 -0500
Message-ID: <1485969964.3261.70.camel@redhat.com>
Subject: Re: [PATCH] Fix __atomic to not implement atomic loads with CAS.
From: Torvald Riegel <triegel@redhat.com>
To: GCC Patches <gcc-patches@gcc.gnu.org>
Cc: Richard Henderson <rth@redhat.com>, Jakub Jelinek <jakub@redhat.com>,        Szabolcs Nagy <szabolcs.nagy@arm.com>
Date: Wed, 01 Feb 2017 17:26:00 -0000
In-Reply-To: <1485802440.16721.118.camel@redhat.com>
References: <1485802440.16721.118.camel@redhat.com>
Content-Type: text/plain; charset="UTF-8"
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes
X-SW-Source: 2017-02/txt/msg00078.txt.bz2

On Mon, 2017-01-30 at 19:54 +0100, Torvald Riegel wrote:
> This patch fixes the __atomic builtins to not implement supposedly
> lock-free atomic loads based on just a compare-and-swap operation.

After an off-list OK by Jakub, I have committed this as r245098.
Jakub will take care of the OpenMP side in a follow-up patch.