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 X-Spam-Level: X-Spam-Status: No, score=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A038ECDFB4 for ; Tue, 17 Jul 2018 21:12:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 21DEC20693 for ; Tue, 17 Jul 2018 21:12:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="hMQ/lrad" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 21DEC20693 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730880AbeGQVrW (ORCPT ); Tue, 17 Jul 2018 17:47:22 -0400 Received: from mail-qk0-f195.google.com ([209.85.220.195]:42107 "EHLO mail-qk0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729805AbeGQVrW (ORCPT ); Tue, 17 Jul 2018 17:47:22 -0400 Received: by mail-qk0-f195.google.com with SMTP id 26-v6so1316430qks.9 for ; Tue, 17 Jul 2018 14:12:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=FVTkNR7nNyWkc6bGhuDo4SJ8a/oDmhYgh0e0q5v3tsU=; b=hMQ/lradULhm1iiZR470AcyhPXvqk4rVYwb8oB/Tl7k2lwEnAa4lXZI8mt3Y3uygNv wjin9deEg2T53GJ0eLs7ISgYyk1W6j8DeRWoB89oBlSHiDJFMWT29AIin1NlFkzPYxrY a6JjNpT9HIlg4By+KvQrVj7Bqnj0wDFJwTRLT9vfl7j5tOY7gbtYeGt8t5sSGWAyC2Yh 7Mj1GFV2K8W1VSLgDDGQImcanuP81u4KET3HgOi50+yDswUNbh6WJZBXCvxUFnozI879 Dv6dCxcIJ94FzVwvce5lj9SYtIOB2dTzuxVKBvIZEXxoIf1VssLJgZPaqr2sOHQ3R5dm oc4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=FVTkNR7nNyWkc6bGhuDo4SJ8a/oDmhYgh0e0q5v3tsU=; b=eFs+uQim7IjA2eYk10m0oFrcMfstEnjk5UiIMJVtvEpHpMLmGFzHVX2aP9TkLUhIbF jNA9IybjYD0Szm+PgkGmxMXR9aK2wt6mlohAAS6lo527CcYBL0hf1JUbCmufL4JyyzMR 9e+FzLiHJQYjm8tcSKt43NTH1UJoHiQdk5g49chAiPKEDqLyX8QavWcdIP1M+I2OuKRG 1ZdInEXzBBnC4HSC98yPrTkFsgsNZ5us5v7IUxOGJVSVQQghlrzJefJYazdS/QDwF4TS QfgQIH0OQXGPRNGHcOgxS9Gfj5CfAtGu1CXqEBHYsjcQmZKfWmuWm3t6DEhJlLxSkM1E Zplg== X-Gm-Message-State: AOUpUlEzHQjRYg0NELWjM3/g3Bg+yvqUl6Q9pxw/2P9VQV/s/YCxroUE yubqYI907DAoDsGBYU/Kfj0= X-Google-Smtp-Source: AAOMgpcVn+3ueySVV2M72AcDybkDr4o9oXka603KLPUudYzBPZjwbMTEvraYpYins/lSlrdSKM/N2Q== X-Received: by 2002:a37:7486:: with SMTP id p128-v6mr3124806qkc.335.1531861972457; Tue, 17 Jul 2018 14:12:52 -0700 (PDT) Received: from oc6857751186.ibm.com (c-24-20-82-131.hsd1.or.comcast.net. [24.20.82.131]) by smtp.gmail.com with ESMTPSA id a19-v6sm1970655qta.50.2018.07.17.14.12.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 17 Jul 2018 14:12:51 -0700 (PDT) Subject: Re: [PATCH] powerpc/msi: Remove VLA usage To: Kees Cook , Benjamin Herrenschmidt Cc: Rob Herring , Randy Dunlap , linux-kernel@vger.kernel.org, Paul Mackerras , Tyrel Datwyler , Andrew Morton , linuxppc-dev@lists.ozlabs.org, Ingo Molnar References: <20180629185254.GA37557@beast> From: Tyrel Datwyler Message-ID: <911632d5-b54c-b632-75d9-7628a0cfc490@gmail.com> Date: Tue, 17 Jul 2018 14:12:49 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <20180629185254.GA37557@beast> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/29/2018 11:52 AM, Kees Cook wrote: > In the quest to remove all stack VLA usage from the kernel[1], this > switches from an unchanging variable to a constant expression to eliminate > the VLA generation. > > [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com > > Cc: Benjamin Herrenschmidt > Cc: Paul Mackerras > Cc: Michael Ellerman > Cc: Andrew Morton > Cc: Randy Dunlap > Cc: Tyrel Datwyler > Cc: Rob Herring > Cc: Ingo Molnar > Cc: linuxppc-dev@lists.ozlabs.org > Signed-off-by: Kees Cook > --- Reviewed-by: Tyrel Datwyler