From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AED40CDB47E for ; Fri, 13 Oct 2023 19:22:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231775AbjJMTWZ (ORCPT ); Fri, 13 Oct 2023 15:22:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231468AbjJMTWX (ORCPT ); Fri, 13 Oct 2023 15:22:23 -0400 Received: from mail-ej1-x62d.google.com (mail-ej1-x62d.google.com [IPv6:2a00:1450:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A213A95 for ; Fri, 13 Oct 2023 12:22:21 -0700 (PDT) Received: by mail-ej1-x62d.google.com with SMTP id a640c23a62f3a-9ba081173a3so404022766b.1 for ; Fri, 13 Oct 2023 12:22:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; t=1697224940; x=1697829740; darn=vger.kernel.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=yMlHIs+RXRwcCam9b7W7YcpdMJXw0XO1+U1rinkBh7Y=; b=B2UXJ/8UW+lWrvcfgGZ79/xVAgiwWwCcEzlsu5QD4aRfSd0ppsdnw/aHTXkDVhK1+p erS3XncMNha87j7pXShBzshTdQGxAoq9oXXwYo7SD0Xmi9WNomuuVkuS43f6j20tFFEW uuQDwbsKi2hSojyJsSd/39B9If/BlzqXP0nT4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697224940; x=1697829740; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=yMlHIs+RXRwcCam9b7W7YcpdMJXw0XO1+U1rinkBh7Y=; b=Nu9iXPqzBZXCsOgxyAxjcziBQJ2DcT7uFyeSCJi9hItzaFa4YdjdjyCgghcV3kCvjs 2HVkBeruXJ1joDnUdlTGRQXSF/VE9MrmXtdLp1VcTkPWd5aNnRBX4RiVm4lhzD4DxuRx rzwroo4DbmQsr8JV5O65LHi4VyBJ1azwyFVBPNUzu19ZPDaaxH/JecMDQoky4Aq6hSD0 bi1kO+9UVJQJ1pdbg2r+qhNbo26jjPSDCY24+8CM/5Ec2iiMyShow/MaETlHyb8tvODY krUBJ9ddmkgPsylkI0nfDO/lL8QaHs6XvXBlJ0WaNHiQsEkjei3MUOhBRRsxwr/feoqJ sa0w== X-Gm-Message-State: AOJu0YwbZJLiMIcz7E6exJNS2/94V/GRrDJJnBXNWwVTVWcq8PTcEWZD ABJ9/4vMcWkAUS6YolTH4NT2pSyvlubwjcOTuA9tVxi7 X-Google-Smtp-Source: AGHT+IGzm52kbpIluUC9fFpPd+zxi0YOO+fM8SIN/PYQU1XKPC4QbXS31Vo7iG/3MRKSZM+BCFfX2g== X-Received: by 2002:a17:906:99c2:b0:9be:7b67:1674 with SMTP id s2-20020a17090699c200b009be7b671674mr40974ejn.3.1697224940182; Fri, 13 Oct 2023 12:22:20 -0700 (PDT) Received: from mail-ej1-f45.google.com (mail-ej1-f45.google.com. [209.85.218.45]) by smtp.gmail.com with ESMTPSA id g21-20020a170906349500b0099290e2c163sm12607067ejb.204.2023.10.13.12.22.19 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 13 Oct 2023 12:22:19 -0700 (PDT) Received: by mail-ej1-f45.google.com with SMTP id a640c23a62f3a-9ba1eb73c27so403547066b.3 for ; Fri, 13 Oct 2023 12:22:19 -0700 (PDT) X-Received: by 2002:a17:907:7790:b0:9b9:facb:d950 with SMTP id ky16-20020a170907779000b009b9facbd950mr17575861ejc.72.1697224939431; Fri, 13 Oct 2023 12:22:19 -0700 (PDT) MIME-Version: 1.0 References: <20220927131518.30000-1-ojeda@kernel.org> <20220927131518.30000-26-ojeda@kernel.org> <20231012104741.GN6307@noisy.programming.kicks-ass.net> <202310121130.256F581823@keescook> <20231013075005.GB12118@noisy.programming.kicks-ass.net> <5D8CA5EF-F5B0-4911-85B8-A363D9344FA7@zytor.com> In-Reply-To: <5D8CA5EF-F5B0-4911-85B8-A363D9344FA7@zytor.com> From: Linus Torvalds Date: Fri, 13 Oct 2023 12:22:02 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v10 25/27] x86: enable initial Rust support To: "H. Peter Anvin" Cc: Ramon de C Valle , Peter Zijlstra , Kees Cook , Sami Tolvanen , Miguel Ojeda , Miguel Ojeda , Greg Kroah-Hartman , rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, patches@lists.linux.dev, Jarkko Sakkinen , Alex Gaynor , Wedson Almeida Filho , David Gow , Boqun Feng , Gary Guo , =?UTF-8?Q?Bj=C3=B6rn_Roy_Baron?= , Jonathan Corbet , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, linux-doc@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 13 Oct 2023 at 12:01, H. Peter Anvin wrote: > > Transparent unions have been standard C since C99. Ahh, I didn't realize they made it into the standard. In gcc, they've been usable for a lot longer (ie --std=gnu89 certainly is happy with them), but the kernel never really picked up on them. I think they've mainly been used by glibc for a couple of functions that can take a couple of different types without complaining. Linus