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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 04EBFEA8130 for ; Tue, 10 Feb 2026 16:09:48 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.1226606.1533118 (Exim 4.92) (envelope-from ) id 1vpqJ4-0001bQ-5j; Tue, 10 Feb 2026 16:09:42 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 1226606.1533118; Tue, 10 Feb 2026 16:09:42 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1vpqJ4-0001bJ-2p; Tue, 10 Feb 2026 16:09:42 +0000 Received: by outflank-mailman (input) for mailman id 1226606; Tue, 10 Feb 2026 16:09:41 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1vpqJ3-0001Zu-IA for xen-devel@lists.xenproject.org; Tue, 10 Feb 2026 16:09:41 +0000 Received: from mail-wm1-x343.google.com (mail-wm1-x343.google.com [2a00:1450:4864:20::343]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id e230b209-069a-11f1-9ccf-f158ae23cfc8; Tue, 10 Feb 2026 17:09:31 +0100 (CET) Received: by mail-wm1-x343.google.com with SMTP id 5b1f17b1804b1-47ff94b46afso55688065e9.1 for ; Tue, 10 Feb 2026 08:09:31 -0800 (PST) Received: from [10.156.60.236] (ip-037-024-206-209.um08.pools.vodafone-ip.de. [37.24.206.209]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4834d5d78cfsm93973395e9.1.2026.02.10.08.09.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 10 Feb 2026 08:09:30 -0800 (PST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: e230b209-069a-11f1-9ccf-f158ae23cfc8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1770739771; x=1771344571; darn=lists.xenproject.org; h=content-transfer-encoding:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to; bh=RZ6QTADTxJ1Sm5PuJcs2ICjg9CNgXCtmQ/pc3kg99iY=; b=VdNbitNAQ+dirdZUMFBfyvMks8DtoX8rgud+CY0irPuv51K8CXFe/YaA+LLn+c/ur7 zMt4UR2rHR5KcUQV4pxBlKUU8qEtMSATZaJLQhbM6c+bXsfeLkHN080KLw/bj7ikN/gB QP4K09mclfYhEV/GcRJjC+gASFQ2JFzXkRFuDiRqqw2ljtqEbss2XWMZCLOkzXtruPqm 9Cm6Kiv5W5u99RZ4PWusszacdwLwFGreUoMXG2qSdMickN9cWPJyjBI8bN1ciG+jip4x gnIHaz3zaqoOkgTPZ44o2qTlQ0v9iAmfa0vh1qHkNkIsLqdcL5ZMAbiSpvd7ZwWyMiRt YauA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770739771; x=1771344571; h=content-transfer-encoding:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=RZ6QTADTxJ1Sm5PuJcs2ICjg9CNgXCtmQ/pc3kg99iY=; b=njxYMcn1lt5U7JTOaxVUyOKmTbDmrv0g7geLKD77zRF1z9ewsLytfYu4BY7PJHJ1r7 VaIbvTbWpCtwIgd8FPckc5PQlKnS0Ttk1LQTLLfB4HItZa9B6rXOhcnMRc6muWiB7WcH vw+MwpeI20Pnx8gKL5kT+aVqd3zYZgOOiv60O8HEn3nD0b5wUx8rkHZ7cKveMo3CQ5Fx k1LLK6oCDJsvwdJks9uOKPmkYa9GhjoVmOZJajfHpNHcTlaDtzG6WXYywv4H8T8pGJFo z1qJ8s8CEse0QTElA1BXRG0BBZ93DLourZBFy7JVhOHJudqVeWw7zgGeds9wDPQQKdig L3lw== X-Forwarded-Encrypted: i=1; AJvYcCVy54k4EevQWMYgYaPJ+BixyuZe/cfwBZLVkG+Xt0PuIQj9u9HiB35zS8aqhNQmVcOt+u+bZA0HiWE=@lists.xenproject.org X-Gm-Message-State: AOJu0Yy4TiT2SPcnFEPpLGzvTnl4PRV5V83IbHnfmPsPqgFWs5eJWEOQ wTGtIAfJs7HPYsbYAFtCr79MKeHRZIt5Ag3WIHTVVUmhIHnSZgYXrcQj2sfxnU8wxZT7RPL+7tL WAwPu/Q== X-Gm-Gg: AZuq6aIrQHoZaKXw51tJAp8+KO8oEj+KGbu9ucmVVLycAHbci65bq7qtev7krlY+iaN krWObBGzCSqIvsOwy+Nu6r3IqtZYgCtmxHT1komW35qdBZUAgqd8rlQA4wn25wCJJ54qQOwg7Yr cdj8KvmBYWXIHxhEE6NmtUHogdJTbtUvImofqaNdfGn99N2OsEvFE3nzT7i4PcCK82z/eyxvg85 nyFVGS9IR1zzwOHC5P6Lr2050iuaTdpV0/q0DSOaCrJllU69ff5RxgGD43uGPxfmnM/GAXr0AKg TBpWmzrMPgQaQGGwcdN8yp2EgfH9cEptvfLtQq2KT9omHMtnyO1nrusamsnN/85AmhUrEzU/BFh TCaDickE7iUYVlEbMZm4fhM32ekPb3Q8RdB8T3MsdaWmBMn1Cu3hytn6HV2W0XBpPZZAb4geMxN 7yQ8DHm16uo5zYUuagT2lcz6oZIofYtrJLv1S+HVQKEuerD4i12u1DEC9udukMxIJ0y3paOLmSr KSpm1xG0pCgZew= X-Received: by 2002:a05:600c:45c6:b0:483:29f4:26b3 with SMTP id 5b1f17b1804b1-48350229208mr41822655e9.1.1770739770976; Tue, 10 Feb 2026 08:09:30 -0800 (PST) Message-ID: Date: Tue, 10 Feb 2026 17:09:29 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] xen: always consider '/' as a division in assembly To: =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= Cc: Bertrand Marquis , Andrew Cooper , Anthony PERARD , Michal Orzel , Julien Grall , Stefano Stabellini , xen-devel@lists.xenproject.org References: <20260210151110.26770-1-roger.pau@citrix.com> <8bef9911-2f37-4cd1-bf18-29cca646fb09@suse.com> Content-Language: en-US From: Jan Beulich Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 10.02.2026 16:53, Roger Pau Monné wrote: > On Tue, Feb 10, 2026 at 04:27:33PM +0100, Jan Beulich wrote: >> On 10.02.2026 16:11, Roger Pau Monne wrote: >>> Pass --divide when when available to signal '/' is >>> +# always used as an operator in assembly. >>> +$(call cc-option-add,CFLAGS,CC,-Wa$$(comma)--divide) >> >> I don't think this should be done here: --divide is an x86-specific >> option. > > Oh, that wasn't clear from the output of as. I can make it > x86-specific then. However, is there any chance of this behavior > escaping outside of x86, and hence would we like to ensure this > behavior on all possible arches? > > Or is it possible that other arches re-use the --divide option for > some other functionality? It is equally possible for that to happen (if some target needs to support '/' as a comment char) as it is for such a target to then use an entirely different command line option. Furthermore, --divide may mean something else on another arch. Jan