Messages in this thread | | | Date | Sat, 18 Sep 2021 15:53:21 +0800 | From | kernel test robot <> | Subject | [ast-bpf:relo_core 5/11] kernel/bpf/btf.c:6498:6: warning: variable 'err' set but not used |
| |
tree: https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git relo_core head: 35a0182c26565e1db43f99a764834bff8a2e4202 commit: 98beca424883749fbcf9f244bb26c96ed3102502 [5/11] bpf: Add bpf_core_add_cands() and wire it into bpf_core_apply_relo_insn(). config: x86_64-randconfig-a002-20210918 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c8b3d7d6d6de37af68b2f379d0e37304f78e115f) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git/commit/?id=98beca424883749fbcf9f244bb26c96ed3102502 git remote add ast-bpf https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git git fetch --no-tags ast-bpf relo_core git checkout 98beca424883749fbcf9f244bb26c96ed3102502 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> kernel/bpf/btf.c:6498:6: warning: variable 'err' set but not used [-Wunused-but-set-variable] int err; ^ 1 warning generated.
vim +/err +6498 kernel/bpf/btf.c
6491 6492 BPF_CALL_5(bpf_core_apply_relo, int, btf_fd, struct bpf_core_relo_desc *, relo, 6493 int, relo_sz, void *, insn, int, flags) 6494 { 6495 struct bpf_core_cand_list *cands = NULL; 6496 struct bpf_core_relo core_relo = {}; 6497 struct btf *btf; > 6498 int err; 6499 6500 if (flags) 6501 return -EINVAL; 6502 6503 if (sizeof(*relo) != relo_sz) 6504 return -EINVAL; 6505 btf = btf_get_by_fd(btf_fd); 6506 if (IS_ERR(btf)) 6507 return PTR_ERR(btf); 6508 if (btf_is_kernel(btf)) { 6509 btf_put(btf); 6510 return -EACCES; 6511 } 6512 if (relo->kind != BPF_CORE_TYPE_ID_LOCAL) { 6513 cands = bpf_core_find_cands(btf, relo->type_id); 6514 if (IS_ERR(cands)) { 6515 btf_put(btf); 6516 printk("target candidate search failed for %d\n", 6517 relo->type_id); 6518 return PTR_ERR(cands); 6519 } 6520 } 6521 core_relo.type_id = relo->type_id; 6522 core_relo.access_str_off = relo->access_str_off; 6523 core_relo.kind = relo->kind; 6524 err = bpf_core_apply_relo_insn("prog_name", insn, 0, &core_relo, 0, btf, cands); 6525 btf_put(btf); 6526 return 0; 6527 } 6528
--- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org [unhandled content-type:application/gzip] | |