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X-CSE-ConnectionGUID: nES5l+SpQgKj1vmPzBvSbA== X-CSE-MsgGUID: rIHLjc4ZTqaDPRIsjfLSwg== X-IronPort-AV: E=McAfee;i="6800,10657,11719"; a="91352582" X-IronPort-AV: E=Sophos;i="6.23,325,1770624000"; d="scan'208";a="91352582" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2026 00:55:45 -0800 X-CSE-ConnectionGUID: 1EdtUNBrT4WZ/Fc4ol0MVQ== X-CSE-MsgGUID: FTFjEgtDRxmV4ldGZ2gw4Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,325,1770624000"; d="scan'208";a="217850906" Received: from lkp-server01.sh.intel.com (HELO cadc4577a874) ([10.239.97.150]) by orviesa010.jf.intel.com with ESMTP; 05 Mar 2026 00:55:42 -0800 Received: from kbuild by cadc4577a874 with local (Exim 4.98.2) (envelope-from ) id 1vy4Ud-000000000N8-0WGA; Thu, 05 Mar 2026 08:55:39 +0000 Date: Thu, 5 Mar 2026 16:55:38 +0800 From: kernel test robot To: Puranjay Mohan , bpf@vger.kernel.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Puranjay Mohan , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Martin KaFai Lau , Eduard Zingerman , Kumar Kartikeya Dwivedi , Mykyta Yatsenko , kernel-team@meta.com Subject: Re: [PATCH bpf 1/3] bpf: fix mm lifecycle in open-coded task_vma iterator Message-ID: <202603051628.H3HNsDUG-lkp@intel.com> References: <20260304142026.1443666-2-puranjay@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260304142026.1443666-2-puranjay@kernel.org> Hi Puranjay, kernel test robot noticed the following build errors: [auto build test ERROR on 3ebc98c1ae7efda949a015990280a097f4a5453a] url: https://github.com/intel-lab-lkp/linux/commits/Puranjay-Mohan/bpf-fix-mm-lifecycle-in-open-coded-task_vma-iterator/20260304-224301 base: 3ebc98c1ae7efda949a015990280a097f4a5453a patch link: https://lore.kernel.org/r/20260304142026.1443666-2-puranjay%40kernel.org patch subject: [PATCH bpf 1/3] bpf: fix mm lifecycle in open-coded task_vma iterator config: arm-randconfig-003-20260305 (https://download.01.org/0day-ci/archive/20260305/202603051628.H3HNsDUG-lkp@intel.com/config) compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 9a109fbb6e184ec9bcce10615949f598f4c974a9) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260305/202603051628.H3HNsDUG-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/202603051628.H3HNsDUG-lkp@intel.com/ All errors (new ones prefixed by >>): >> kernel/bpf/task_iter.c:840:3: error: call to undeclared function 'mmput_async'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 840 | mmput_async(work->mm); | ^ kernel/bpf/task_iter.c:848:3: error: call to undeclared function 'mmput_async'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 848 | mmput_async(mm); | ^ 2 errors generated. vim +/mmput_async +840 kernel/bpf/task_iter.c 833 834 static void do_bpf_iter_mmput(struct irq_work *entry) 835 { 836 struct bpf_iter_mmput_irq_work *work; 837 838 work = container_of(entry, struct bpf_iter_mmput_irq_work, irq_work); 839 if (work->mm) { > 840 mmput_async(work->mm); 841 work->mm = NULL; 842 } 843 } 844 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki