Hi Yafang, kernel test robot noticed the following build errors: [auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Yafang-Shao/bpf-Add-bpf_iter_cpumask-kfuncs/20240110-140322 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20240110060037.4202-3-laoar.shao%40gmail.com patch subject: [PATCH v2 bpf-next 2/2] selftests/bpf: Add selftests for cpumask iter compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240115/202401150914.Rcl50Ct9-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202401150914.Rcl50Ct9-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> progs/test_cpumask_iter.c:20:21: error: use of undeclared identifier 'NR_PSI_TASK_COUNTS' 20 | unsigned int tasks[NR_PSI_TASK_COUNTS]; | ^ >> progs/test_cpumask_iter.c:41:2: error: assigning to 'u32 *' (aka 'unsigned int *') from 'int *' converts between pointers to integer types with different sign [-Werror,-Wpointer-sign] 41 | bpf_for_each(cpumask, cpu, &mask->cpumask) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /tools/include/bpf/bpf_helpers.h:348:10: note: expanded from macro 'bpf_for_each' 348 | (((cur) = bpf_iter_##type##_next(&___it))); \ | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> progs/test_cpumask_iter.c:51:55: error: incomplete definition of type 'struct psi_group_cpu' 51 | bpf_probe_read_kernel(&tasks, sizeof(tasks), &groupc->tasks); | ~~~~~~^ progs/test_cpumask_iter.c:11:21: note: forward declaration of 'struct psi_group_cpu' 11 | extern const struct psi_group_cpu system_group_pcpu __ksym __weak; | ^ >> progs/test_cpumask_iter.c:52:27: error: use of undeclared identifier 'NR_RUNNING'; did you mean 'T_RUNNING'? 52 | psi_nr_running += tasks[NR_RUNNING]; | ^~~~~~~~~~ | T_RUNNING /tools/include/vmlinux.h:11216:3: note: 'T_RUNNING' declared here 11216 | T_RUNNING = 0, | ^ 4 errors generated. -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
