From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f43.google.com (mail-ej1-f43.google.com [209.85.218.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6F9F121A0A for ; Fri, 13 Oct 2023 19:22:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linuxfoundation.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="exC4QrRo" Received: by mail-ej1-f43.google.com with SMTP id a640c23a62f3a-9ba1eb73c27so403550566b.3 for ; Fri, 13 Oct 2023 12:22:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; t=1697224940; x=1697829740; darn=lists.linux.dev; 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=exC4QrRoeOAxLMoQ0KAJhgvEBqX4GZCIkOnOukctLun47TFnz8ZSkPBBpr5KlCWZcA 9gdYKBWungHHr8sAXN/GjUTH3RY3sgMvlgLUG67l6YagGkC1CGaqzBwetLM8YhUjRZnT Zc6HYtXJKe+2f3+9oOwiQCSOZ4/G0//j1jjTI= 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=tMWzAEd+MJFo7MgCmb5QrLEGGCU4nCCBdJMCybO0p0Rv76EDJaEYnnZwS01dooXxkd j602THmkjyv8xLTCmHGlHnVPcqH5Xit8vBRzXfSoOvqo9BiXrGmHaFIL23WxSyslA6EX rbfrTz6zLlux0aNMBSlHVdYnVFmsmtnB6j1Se/iHAe0e3mnnaDOefRmdkG1CJku+CAkH 4a7r+y2RP60W4Kl2SVzyF4MN2P6yEseKxAALWNpouKKztZ8RmMupA3bru1rvWA2Ku56J EuhfVYChCD3g2IHmOBUrB6mzNT7c8H7WiTVQ8YFeE4lSW2syA9vL1vxg9h+vIg6j71bS Lovw== X-Gm-Message-State: AOJu0YyanVM9DCMKCCNKZ4889sVcoqu2gIblxNoj4u6K30wA+aKIoiZi 7wyzrU1roo7p4r1j+Z6olDwS8MhXsC7bVwsHOfHtvJuX X-Google-Smtp-Source: AGHT+IHlinxZcZLi0SbE8fCODmnOtly5R35apnKV8ugShIZzDyayp/9xXCYXWtkNs77jIcJrBhRYzg== X-Received: by 2002:a17:907:1dd2:b0:9ae:406c:3425 with SMTP id og18-20020a1709071dd200b009ae406c3425mr25872408ejc.0.1697224940604; Fri, 13 Oct 2023 12:22:20 -0700 (PDT) Received: from mail-ej1-f43.google.com (mail-ej1-f43.google.com. [209.85.218.43]) by smtp.gmail.com with ESMTPSA id lz11-20020a170906fb0b00b009b97521b58bsm12776397ejb.39.2023.10.13.12.22.19 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-f43.google.com with SMTP id a640c23a62f3a-9a6190af24aso407534166b.0 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) Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: 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" 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