* Re: [PATCH bpf 1/3] bpf: fix mm lifecycle in open-coded task_vma iterator
[not found] <20260304142026.1443666-2-puranjay@kernel.org>
@ 2026-03-05 8:55 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-03-05 8:55 UTC (permalink / raw)
To: Puranjay Mohan, bpf
Cc: llvm, oe-kbuild-all, Puranjay Mohan, Alexei Starovoitov,
Andrii Nakryiko, Daniel Borkmann, Martin KaFai Lau,
Eduard Zingerman, Kumar Kartikeya Dwivedi, Mykyta Yatsenko,
kernel-team
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 <lkp@intel.com>
| 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
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