From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 79B582367D6 for ; Thu, 4 Sep 2025 02:18:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756952302; cv=none; b=IhSn61xJjDKac6+50pySV/kZvKvMu7jOFoFwm77+gDmr9eToxpDfeL+SFdFrJMVcgERRsC9AswlGyx/hb1XA2xVZxLqwQJ7qMj5Fl6oPSn0MNqksFewcDDG1EXXHpidT3LfQKAOwji3Tq0Wf0a/hWjLxwUjt6r7Eb/XwFMf+85g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756952302; c=relaxed/simple; bh=ft6fMhgbRvb0El/BGYSunQJU3asSMpxYUrHSPdZXrus=; h=Subject:To:Cc:References:From:Message-ID:Date:MIME-Version: In-Reply-To:Content-Type; b=m6M1QmNQxz2N+WDBphBi6VZH88Fbq2s0CeeVdKyVOos7PAzSdx6Yu8Bqg1ZkfvR6ykuKRq28TEeAzytOlJP7JiJl0T8pF1t21zCoHGugvA/rEs1QHx3CWPQi9G6sscBJ7KwXIJ6ygyITiqYLcedKvPbV9fda76i+NXgeozxOk1M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [113.200.148.30]) by gateway (Coremail) with SMTP id _____8Bx37_m9rhoNXsGAA--.12371S3; Thu, 04 Sep 2025 10:18:14 +0800 (CST) Received: from [10.130.10.66] (unknown [113.200.148.30]) by front1 (Coremail) with SMTP id qMiowJAxE+Tk9rhoB9h8AA--.1616S3; Thu, 04 Sep 2025 10:18:13 +0800 (CST) Subject: Re: [PATCH v1 2/3] objtool/LoongArch: Fix unreachable instruction warnings about EFISTUB To: Josh Poimboeuf Cc: Peter Zijlstra , Huacai Chen , Nathan Chancellor , loongarch@lists.linux.dev, linux-kernel@vger.kernel.org References: <20250901072156.31361-1-yangtiezhu@loongson.cn> <20250901072156.31361-3-yangtiezhu@loongson.cn> <20250901081904.GB4067720@noisy.programming.kicks-ass.net> <82c913b9-4403-cde9-0542-5bd6e04415f5@loongson.cn> From: Tiezhu Yang Message-ID: Date: Thu, 4 Sep 2025 10:18:12 +0800 User-Agent: Mozilla/5.0 (X11; Linux loongarch64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowJAxE+Tk9rhoB9h8AA--.1616S3 X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBj9xXoWrtF1rWFy5Kr1kGr17XFyfXwc_yoW3trg_ur 1xZFs2ywn8AF4jy3ZxKr1FvFZ7WFyDWFWUXrZ5Xw1jq34rJayqkrWkAr93Z3s5KFsxZ3Zx GF4UWFyrWr12kosvyTuYvTs0mTUanT9S1TB71UUUUUJqnTZGkaVYY2UrUUUUj1kv1TuYvT s0mT0YCTnIWjqI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUI cSsGvfJTRUUUbDAYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20x vaj40_Wr0E3s1l1IIY67AEw4v_Jrv_JF1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV WxJVW8Jr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_ GcCE3s1ln4kS14v26r1Y6r17M2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2 x26I8E6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r126r1D McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IY64vIr41lc7 I2V7IY0VAS07AlzVAYIcxG8wCY1x0262kKe7AKxVWUAVWUtwCF04k20xvY0x0EwIxGrwCF x2IqxVCFs4IE7xkEbVWUJVW8JwCFI7km07C267AKxVWUXVWUAwC20s026c02F40E14v26r 1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij 64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr 0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF 0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x07jOiSdUUUUU= On 2025/9/4 上午3:19, Josh Poimboeuf wrote: > On Mon, Sep 01, 2025 at 04:39:29PM +0800, Tiezhu Yang wrote: >> On 2025/9/1 下午4:19, Peter Zijlstra wrote: >>> On Mon, Sep 01, 2025 at 03:21:55PM +0800, Tiezhu Yang wrote: >>>> When compiling with LLVM and CONFIG_LTO_CLANG is set, there exist the >>>> following objtool warnings: ... >> Josh suggested to do something to put these instructions in the data >> section, but as said in the previous reply, it needs to modify the link >> process and seems too complicated and expensive for this warning to some >> extent. >> >> So I did this change for objtool. > > I don't like this workaround either, how exactly is it complicated and > expensive to put the data in a data section? I can put them in a data section in the next version, this is reasonable. Thanks, Tiezhu