Hi Eduard, 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/Eduard-Zingerman/bpf-rename-nocsr-bpf_fastcall-in-verifier/20240817-095340 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20240817015140.1039351-4-eddyz87%40gmail.com patch subject: [PATCH bpf-next v2 3/5] bpf: support bpf_fastcall patterns for kfuncs config: arc-randconfig-002-20240817 (https://download.01.org/0day-ci/archive/20240818/202408180356.YZnBVEv3-lkp@xxxxxxxxx/config) compiler: arceb-elf-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240818/202408180356.YZnBVEv3-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/202408180356.YZnBVEv3-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): kernel/bpf/verifier.c: In function 'kfunc_fastcall_clobber_mask': >> kernel/bpf/verifier.c:16146:33: warning: variable 'params' set but not used [-Wunused-but-set-variable] 16146 | const struct btf_param *params; | ^~~~~~ vim +/params +16146 kernel/bpf/verifier.c 16142 16143 /* Same as helper_fastcall_clobber_mask() but for kfuncs, see comment above */ 16144 static u32 kfunc_fastcall_clobber_mask(struct bpf_kfunc_call_arg_meta *meta) 16145 { 16146 const struct btf_param *params; 16147 u32 vlen, i, mask; 16148 16149 params = btf_params(meta->func_proto); 16150 vlen = btf_type_vlen(meta->func_proto); 16151 mask = 0; 16152 if (!btf_type_is_void(btf_type_by_id(meta->btf, meta->func_proto->type))) 16153 mask |= BIT(BPF_REG_0); 16154 for (i = 0; i < vlen; ++i) 16155 mask |= BIT(BPF_REG_1 + i); 16156 return mask; 16157 } 16158 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
