Hi Charalampos, kernel test robot noticed the following build warnings: [auto build test WARNING on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Charalampos-Stylianopoulos/bpf-Add-map_num_entries-map-op/20250106-225520 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20250106145328.399610-3-charalampos.stylianopoulos%40gmail.com patch subject: [PATCH bpf-next 2/4] bpf: Add bpf command to get number of map entries config: nios2-randconfig-r072-20250107 (https://download.01.org/0day-ci/archive/20250108/202501080123.MlvmZO4I-lkp@xxxxxxxxx/config) compiler: nios2-linux-gcc (GCC) 14.2.0 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/202501080123.MlvmZO4I-lkp@xxxxxxxxx/ New smatch warnings: kernel/bpf/syscall.c:5771 bpf_get_num_entries() warn: unsigned 'num_entries' is never less than zero. Old smatch warnings: arch/nios2/include/asm/thread_info.h:62 current_thread_info() error: uninitialized symbol 'sp'. vim +/num_entries +5771 kernel/bpf/syscall.c 5752 5753 static int bpf_get_num_entries(union bpf_attr *attr, union bpf_attr __user *uattr) 5754 { 5755 __u32 num_entries = 0; 5756 struct bpf_map *map; 5757 5758 if (CHECK_ATTR(BPF_MAP_GET_NUM_ENTRIES)) 5759 return -EINVAL; 5760 5761 5762 CLASS(fd, f)(attr->map_fd); 5763 map = __bpf_map_get(f); 5764 if (IS_ERR(map)) 5765 return PTR_ERR(map); 5766 5767 if (!map->ops->map_num_entries) 5768 return -EOPNOTSUPP; 5769 5770 num_entries = map->ops->map_num_entries(map); > 5771 if (num_entries < 0) 5772 return num_entries; 5773 5774 if (put_user(num_entries, &uattr->map_get_num_entries.num_entries)) 5775 return -EFAULT; 5776 5777 return 0; 5778 } 5779 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki