Hi Dave, 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/Dave-Marchevsky/bpf-Support-BPF_F_MMAPABLE-task_local-storage/20231121-020345 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20231120175925.733167-2-davemarchevsky%40fb.com patch subject: [PATCH v1 bpf-next 1/2] bpf: Support BPF_F_MMAPABLE task_local storage config: sparc-randconfig-r081-20231121 (https://download.01.org/0day-ci/archive/20231121/202311211037.6BmDdrr4-lkp@xxxxxxxxx/config) compiler: sparc-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231121/202311211037.6BmDdrr4-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/202311211037.6BmDdrr4-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> kernel/bpf/syscall.c:407:20: warning: no previous prototype for 'bpf_map_get_memcg' [-Wmissing-prototypes] 407 | struct mem_cgroup *bpf_map_get_memcg(const struct bpf_map *map) | ^~~~~~~~~~~~~~~~~ -- >> kernel/bpf/bpf_local_storage.c:30:7: warning: no previous prototype for 'alloc_mmapable_selem_value' [-Wmissing-prototypes] 30 | void *alloc_mmapable_selem_value(struct bpf_local_storage_map *smap) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/bpf_local_storage.c: In function 'bpf_selem_free_rcu': kernel/bpf/bpf_local_storage.c:288:39: warning: variable 'smap' set but not used [-Wunused-but-set-variable] 288 | struct bpf_local_storage_map *smap; | ^~~~ vim +/bpf_map_get_memcg +407 kernel/bpf/syscall.c 406 > 407 struct mem_cgroup *bpf_map_get_memcg(const struct bpf_map *map) 408 { 409 if (map->objcg) 410 return get_mem_cgroup_from_objcg(map->objcg); 411 412 return root_mem_cgroup; 413 } 414 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
