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 E1160C43334 for ; Tue, 28 Jun 2022 07:27:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242766AbiF1H1w convert rfc822-to-8bit (ORCPT ); Tue, 28 Jun 2022 03:27:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242985AbiF1H1h (ORCPT ); Tue, 28 Jun 2022 03:27:37 -0400 Received: from mail-qv1-f41.google.com (mail-qv1-f41.google.com [209.85.219.41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C165B2CE26; Tue, 28 Jun 2022 00:27:35 -0700 (PDT) Received: by mail-qv1-f41.google.com with SMTP id i17so18728446qvo.13; Tue, 28 Jun 2022 00:27:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=hwgLtruPC06mcRCnQAsf+kJqHCP1mf00hTNnpiQ34M0=; b=3tQxdeTXaeHedyn+zuV/55ACvAhAXmWcP4mEBFJ7jzsyYq6RsSgMON/8hhCXyPFuse MLSN3K1iygLYNzbYfsEUEZlABb1G1eppIZbae+40fb4YMxpctrE+lrJz3qET/ldo5zGd 37edeyXGnan1cSc5wL4OCPTZESLkJDeXBVsf5Jitdq4F2SUoLicy4d+r65QQwFBoAQaF rVmUy/gVspn4buiPbwq5cSH0lOm6yf061HBv7eJrhJeCu9Xa08CHGXWzt6wFcbBU42zO cc0C2wJwrVFqggLP3rTWVXzc4tL0SV7qsxw7pHWn+6UvTIPwY9qNnceTZYR/8yu6Ppqr 0hkQ== X-Gm-Message-State: AJIora91XfpVhN+yRTRlxkAy8ZQagB28kxgOh0hSO/dgpIY4a+cEmxEM RRrXPZ914wNJxYzvqW7oNwha7fO41WOfPA== X-Google-Smtp-Source: AGRyM1vuyurBth3w/1QAUlj3nOiF8B4hIrD4wqWY4IUnkxCMfrPNbOyI3fDTEu0sS0pUw3shJaj5og== X-Received: by 2002:a05:622a:647:b0:306:6b30:bd0a with SMTP id a7-20020a05622a064700b003066b30bd0amr12004710qtb.327.1656401254977; Tue, 28 Jun 2022 00:27:34 -0700 (PDT) Received: from mail-yw1-f182.google.com (mail-yw1-f182.google.com. [209.85.128.182]) by smtp.gmail.com with ESMTPSA id f14-20020a05620a408e00b006a5d2eb58b2sm11643530qko.33.2022.06.28.00.27.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 28 Jun 2022 00:27:34 -0700 (PDT) Received: by mail-yw1-f182.google.com with SMTP id 00721157ae682-3176b6ed923so107319457b3.11; Tue, 28 Jun 2022 00:27:33 -0700 (PDT) X-Received: by 2002:a81:a092:0:b0:318:5c89:a935 with SMTP id x140-20020a81a092000000b003185c89a935mr20762801ywg.383.1656401253054; Tue, 28 Jun 2022 00:27:33 -0700 (PDT) MIME-Version: 1.0 References: <20220627180432.GA136081@embeddedor> In-Reply-To: <20220627180432.GA136081@embeddedor> From: Geert Uytterhoeven Date: Tue, 28 Jun 2022 09:27:21 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH][next] treewide: uapi: Replace zero-length arrays with flexible-array members To: "Gustavo A. R. Silva" Cc: Kees Cook , Linux Kernel Mailing List , "the arch/x86 maintainers" , dm-devel@redhat.com, linux-m68k , "open list:BROADCOM NVRAM DRIVER" , linux-s390 , KVM list , Intel Graphics Development , DRI Development , netdev , bpf , linux-btrfs , linux-can@vger.kernel.org, Linux FS Devel , linux1394-devel@lists.sourceforge.net, io-uring@vger.kernel.org, lvs-devel@vger.kernel.org, MTD Maling List , kasan-dev , Linux MMC List , nvdimm@lists.linux.dev, NetFilter , coreteam@netfilter.org, linux-perf-users@vger.kernel.org, linux-raid@vger.kernel.org, linux-sctp@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, Linux ARM , scsi , target-devel , USB list , virtualization@lists.linux-foundation.org, V9FS Developers , linux-rdma , ALSA Development Mailing List , linux-hardening@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Hi Gustavo, Thanks for your patch! On Mon, Jun 27, 2022 at 8:04 PM Gustavo A. R. Silva wrote: > There is a regular need in the kernel to provide a way to declare > having a dynamically sized set of trailing elements in a structure. > Kernel code should always use “flexible array members”[1] for these > cases. The older style of one-element or zero-length arrays should > no longer be used[2]. These rules apply to the kernel, but uapi is not considered part of the kernel, so different rules apply. Uapi header files should work with whatever compiler that can be used for compiling userspace. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds