From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 213F0329389; Wed, 21 Jan 2026 10:52:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768992751; cv=none; b=LZNO/Qvezu5l3Nq8p8SJdrK+3he7Tc48IuXM9lTx73vcXr+whnmgT4LeFnP8HpTvB7DLDHjK/MLMQYMM2CEkyQWfgEFIvaldr6uTyWqm8IupyWQcxojZMAHlzVKYWqXNcCPzh1ep2iQ4J1lTONmHquDScjkFIJ/RCoHF8DpixHg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768992751; c=relaxed/simple; bh=zentEggJB15fpY/dTvVopIwQnpJkPOZu/7p1qtWMRnU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=k7VpRHkGRIVz1LP6vTcaCOefifxBpAcIVEzAMxDXdm/+3Vkni3jyVOsYzzHnJXMKQBUMonnxQ3NocSbeNqbZFIefObXA0ratF5v2+3g8xy7TBRoJ7uSbwUe9vol119u3tFCOZqh+4ej8YT3Ar0yCoaDjGYTe6nK5J9K1iavAwtE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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