Hi Amery, 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/Amery-Hung/bpf-Allow-getting-bpf_map-from-struct_ops-kdata/20250801-051108 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20250731210950.3927649-2-ameryhung%40gmail.com patch subject: [PATCH bpf-next v1 1/3] bpf: Allow getting bpf_map from struct_ops kdata config: arm-randconfig-001-20250801 (https://download.01.org/0day-ci/archive/20250801/202508011701.e7Owy62s-lkp@xxxxxxxxx/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 8f09b03aebb71c154f3bbe725c29e3f47d37c26e) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250801/202508011701.e7Owy62s-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/202508011701.e7Owy62s-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> kernel/bpf/bpf_struct_ops.c:1157:18: warning: unused variable 'map' [-Wunused-variable] 1157 | struct bpf_map *map; | ^~~ 1 warning generated. vim +/map +1157 kernel/bpf/bpf_struct_ops.c 85d33df357b634 Martin KaFai Lau 2020-01-08 1149 85d33df357b634 Martin KaFai Lau 2020-01-08 1150 /* "const void *" because some subsystem is 85d33df357b634 Martin KaFai Lau 2020-01-08 1151 * passing a const (e.g. const struct tcp_congestion_ops *) 85d33df357b634 Martin KaFai Lau 2020-01-08 1152 */ eab8366be0bf63 Amery Hung 2025-07-31 1153 struct bpf_map *bpf_struct_ops_get(const void *kdata) 85d33df357b634 Martin KaFai Lau 2020-01-08 1154 { 85d33df357b634 Martin KaFai Lau 2020-01-08 1155 struct bpf_struct_ops_value *kvalue; b671c2067a04c0 Kui-Feng Lee 2023-03-22 1156 struct bpf_struct_ops_map *st_map; b671c2067a04c0 Kui-Feng Lee 2023-03-22 @1157 struct bpf_map *map; 85d33df357b634 Martin KaFai Lau 2020-01-08 1158 85d33df357b634 Martin KaFai Lau 2020-01-08 1159 kvalue = container_of(kdata, struct bpf_struct_ops_value, data); b671c2067a04c0 Kui-Feng Lee 2023-03-22 1160 st_map = container_of(kvalue, struct bpf_struct_ops_map, kvalue); 85d33df357b634 Martin KaFai Lau 2020-01-08 1161 eab8366be0bf63 Amery Hung 2025-07-31 1162 return __bpf_map_inc_not_zero(&st_map->map, false); eb18b49ea758ec Martin KaFai Lau 2021-08-24 1163 } eab8366be0bf63 Amery Hung 2025-07-31 1164 EXPORT_SYMBOL_GPL(bpf_struct_ops_get); eb18b49ea758ec Martin KaFai Lau 2021-08-24 1165 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
