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.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 71B64C44503 for ; Wed, 21 Jan 2026 10:53:05 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4dx1J015DPz2xqD; Wed, 21 Jan 2026 21:53:04 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1768992784; cv=none; b=Zs31MCBSg0pEeEP7M/Vn5+e+nKDKaXBd65HlS+0fnfJj7tG7Y2aLXXAzBeLGp6HMomLiQrXb6aU9ASXlLO5YEHk7iF4Ym5zlODFHmxrD2X9JfaSrixDcyJ8WHZuBnZYlXhA5NNsD/KjOLl8UapD86PsH1CtVrxO7raOfoIt1BHbVkBwIKEs0WVZFrK35SzgZQgRW6P5PKiCe2miRhFaPhYJbUHsV8s9ONGhQRquiryPE0G1+/1sRUMSMUnc9W4/ugfY87wsMpM9U8RZASy51/oBZxJct3uWNJ6AUZLokY7Crs4i2q2Wu3eBiuAMZmGgr18bKN31jhobkIRFuBVvWEg== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1768992784; c=relaxed/relaxed; bh=Bhj8EYz+g3zatERB8cbuc1TV6/t3L2pcr7P/WBnmHiE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fviBdHYh44ruAl01P70j1BGvlEguD820/7UV69nLpc77pZOUeWhotg2cLcpCa7nK9xNhg6xGwEhaNGh/TADEZM3YhAPHfTk0Xanuv7GbTilvneM63CnVwe3CHebwPIxCTSpS2VjHmh4f4D/bEUKX2m3j5wnf/JQ3mLp/Oi8A78dM0oz8wgdKVEpDjns5lnOSJ1hJO8By3gi39Hc3eb4ZiXMEyjtN+ILQzxaVwh6ZNJC3pmz4rxtp3XMoPAVyTBqEgc7VdE7QiiUysSQ4xtZZJNLsV5NRUwsyO2Y32bFf6eqYuDzzNATzyAn5gJnQQlpzTNCBGLZULsLYeyRpjOxXuw== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=ryan.roberts@arm.com; receiver=lists.ozlabs.org) smtp.mailfrom=arm.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=ryan.roberts@arm.com; receiver=lists.ozlabs.org) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 4dx1Hy3gtJz2xm5 for ; Wed, 21 Jan 2026 21:53:00 +1100 (AEDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id BF6CE1476; Wed, 21 Jan 2026 02:52:21 -0800 (PST) Received: from [10.1.25.175] (XHFQ2J9959.cambridge.arm.com [10.1.25.175]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 02DD53F632; Wed, 21 Jan 2026 02:52:22 -0800 (PST) Message-ID: <46c7d109-b076-4bb3-9e6e-36c34c546c20@arm.com> Date: Wed, 21 Jan 2026 10:52:21 +0000 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 3/3] randomize_kstack: Unify random source across arches Content-Language: en-GB To: kernel test robot , Catalin Marinas , Will Deacon , Huacai Chen , Madhavan Srinivasan , Michael Ellerman , Paul Walmsley , Palmer Dabbelt , Albert Ou , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Kees Cook , "Gustavo A. R. Silva" , Arnd Bergmann , Mark Rutland , "Jason A. Donenfeld" , Ard Biesheuvel , Jeremy Linton , David Laight Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org References: <20260119130122.1283821-4-ryan.roberts@arm.com> <202601210752.6Nsv9et9-lkp@intel.com> From: Ryan Roberts In-Reply-To: <202601210752.6Nsv9et9-lkp@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 20/01/2026 23:50, kernel test robot wrote: > Hi Ryan, > > kernel test robot noticed the following build warnings: > > [auto build test WARNING on akpm-mm/mm-everything] > [also build test WARNING on linus/master v6.19-rc6 next-20260119] > [cannot apply to tip/sched/core kees/for-next/hardening kees/for-next/execve] > [If your patch is applied to the wrong git tree, kindly drop us a note. > And when submitting patch, we suggest to use '--base' as documented in > https://git-scm.com/docs/git-format-patch#_base_tree_information] > > url: https://github.com/intel-lab-lkp/linux/commits/Ryan-Roberts/randomize_kstack-Maintain-kstack_offset-per-task/20260119-210329 > base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything > patch link: https://lore.kernel.org/r/20260119130122.1283821-4-ryan.roberts%40arm.com > patch subject: [PATCH v4 3/3] randomize_kstack: Unify random source across arches > config: x86_64-allmodconfig (https://download.01.org/0day-ci/archive/20260121/202601210752.6Nsv9et9-lkp@intel.com/config) > compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260121/202601210752.6Nsv9et9-lkp@intel.com/reproduce) > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-kbuild-all/202601210752.6Nsv9et9-lkp@intel.com/ > > All warnings (new ones prefixed by >>): > >>> vmlinux.o: warning: objtool: do_syscall_64+0x2c: call to preempt_count_add() leaves .noinstr.text section >>> vmlinux.o: warning: objtool: __do_fast_syscall_32+0x3d: call to preempt_count_add() leaves .noinstr.text section Hmm, clearly Dave was correct not to rush this through... yuck. I'll take a look, but I guess there is no rush if this won't go into -next until shortly after -rc1. Thanks, Ryan