Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp1186776imu; Thu, 13 Dec 2018 10:44:17 -0800 (PST) X-Google-Smtp-Source: AFSGD/WrnMl0B4E9ml8K17l9WpFLDXsW+oqwcTorVM47wXHmp+LJbeJukQvZiCd867JPibOnUgTU X-Received: by 2002:a65:530c:: with SMTP id m12mr22090855pgq.224.1544726657120; Thu, 13 Dec 2018 10:44:17 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1544726657; cv=none; d=google.com; s=arc-20160816; b=wyP0cJhGd78sG3V3+7c27sslzZfDDw1qkr5pcOaiDiYzdj4f/bAp+TJ4ve7+KPC6UV HooeuN5UIcnOPDFe0lgCLje/WE5ieEGVZJr2STxPBt7lLdP8twsArqGN6U2i3EuQ9BsS nluwhwzZwaQ/cyvukuJihMzPjLLFBHJ5t42n4m0RvDhd82jZj8p/0oe0IuXmlDBv47T0 R716ePViiSZbZKXmh//BwHvoaDVo2LuK9GYNU5Z1UymB23NngPJkzBSmUmLaUfgEGalw wyod5Mbsfym/29JrN5ZS1UioDxtSb/IXrG9M2WPXIZtneeJesH3itwEnDJhvsjf8MCoa dlqg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:user-agent:references :message-id:in-reply-to:subject:cc:to:from:date; bh=TJza8B5QIcuXcJV/Ra5zGCMrABDeKYdL4JXPrSlJ+hw=; b=We/03NWWUXepSEAQeEixuG3UWdElb0esLXDA4y5Eahv70sbdpuiVN3c5lCnanfjU2B rrrz3kuddVzKRbu/muSfbplD1ztnuIRasknVvvPz341/CQKdZIeyK8bi5zT3Nu5zJdzQ Am/Oq2mbfuXvwStL3TTZijGbx3/zyKnUlvfvn9j5P0mkjKtJeG04D8d3TttYkO/ymyrB cE8TC9SIRDwUNCH2ntPyzqSA8oZeKsK1bFJeoM5uT7HK97r5Lfw7qK+afjWvVtV8pbGF satGYmxCOxsL6rAsrmNfs0bxxEBAbxHWN0LdZCLKRMkGN35fJupRDZh84N8eL/yb2Z9E v/Pw== 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 i69si2193311pgd.71.2018.12.13.10.43.58; Thu, 13 Dec 2018 10:44:17 -0800 (PST) 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 S1726630AbeLMSnB (ORCPT + 99 others); Thu, 13 Dec 2018 13:43:01 -0500 Received: from relay1.mentorg.com ([192.94.38.131]:45457 "EHLO relay1.mentorg.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726381AbeLMSnB (ORCPT ); Thu, 13 Dec 2018 13:43:01 -0500 Received: from nat-ies.mentorg.com ([192.94.31.2] helo=svr-ies-mbx-01.mgc.mentorg.com) by relay1.mentorg.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-SHA384:256) id 1gXVwf-00034E-Ph from joseph_myers@mentor.com ; Thu, 13 Dec 2018 10:42:49 -0800 Received: from digraph.polyomino.org.uk (137.202.0.90) by svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) with Microsoft SMTP Server (TLS) id 15.0.1320.4; Thu, 13 Dec 2018 18:42:46 +0000 Received: from jsm28 (helo=localhost) by digraph.polyomino.org.uk with local-esmtp (Exim 4.90_1) (envelope-from ) id 1gXVwb-0002GH-US; Thu, 13 Dec 2018 18:42:45 +0000 Date: Thu, 13 Dec 2018 18:42:45 +0000 From: Joseph Myers X-X-Sender: jsm28@digraph.polyomino.org.uk To: Florian Weimer CC: Rich Felker , Catalin Marinas , Andy Lutomirski , , Linus Torvalds , X86 ML , LKML , Linux API , "H. Peter Anvin" , Peter Zijlstra , Borislav Petkov , Mike Frysinger , "H. J. Lu" , , Arnd Bergmann , Will Deacon Subject: Re: Can we drop upstream Linux x32 support? In-Reply-To: <87o99pl8es.fsf@oldenburg2.str.redhat.com> Message-ID: References: <20181212165237.GT23599@brightrain.aerifal.cx> <20181213124025.bczxzj6ez34joo6v@localhost> <20181213155744.GU23599@brightrain.aerifal.cx> <87o99pl8es.fsf@oldenburg2.str.redhat.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-Originating-IP: [137.202.0.90] X-ClientProxiedBy: svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) To svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 13 Dec 2018, Florian Weimer wrote: > Similarly, we could have integer types with trap representations. C++2a will require two's complement representation for integer types, with no trap representations (other than for bool, where only 0 and 1 are valid representations). It seems very plausible that C will follow. -- Joseph S. Myers joseph@codesourcery.com