Hi kunyu, kernel test robot noticed the following build errors: [auto build test ERROR on bpf-next/master] [also build test ERROR on bpf/master net-next/main net/main linus/master v6.10-rc3 next-20240612] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/kunyu/x86-net-bpf_jit_comp32-Remove-unused-cnt-variables-from-most-functions/20240612-170017 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20240612085823.28133-1-kunyu%40nfschina.com patch subject: [PATCH] x86: net: bpf_jit_comp32: Remove unused 'cnt' variables from most functions config: i386-buildonly-randconfig-005-20240613 (https://download.01.org/0day-ci/archive/20240613/202406130855.la1z88C0-lkp@xxxxxxxxx/config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240613/202406130855.la1z88C0-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/202406130855.la1z88C0-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_mov_i': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:68:24: note: in expansion of macro 'EMIT' #define EMIT2(b1, b2) EMIT((b1) + ((b2) << 8), 2) ^~~~ arch/x86/net/bpf_jit_comp32.c:214:4: note: in expansion of macro 'EMIT2' EMIT2(0x33, add_2reg(0xC0, IA32_EAX, IA32_EAX)); ^~~~~ arch/x86/net/bpf_jit_comp32.c:65:43: note: each undeclared identifier is reported only once for each function it appears in do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:68:24: note: in expansion of macro 'EMIT' #define EMIT2(b1, b2) EMIT((b1) + ((b2) << 8), 2) ^~~~ arch/x86/net/bpf_jit_comp32.c:214:4: note: in expansion of macro 'EMIT2' EMIT2(0x33, add_2reg(0xC0, IA32_EAX, IA32_EAX)); ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_mov_r': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:241:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), STACK_VAR(src)); ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_mul_r': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:291:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_ECX), STACK_VAR(src)); ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_to_le_r64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:323:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_to_be_r64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:370:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_div_mod_r': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:437:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_ECX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_shift_r': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:485:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), STACK_VAR(dst)); ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_alu_r': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:526:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), STACK_VAR(src)); ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_alu_i': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:599:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), STACK_VAR(dst)); ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_neg64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:696:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_lsh_r64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:729:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_arsh_r64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:781:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_rsh_r64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:833:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_lsh_i64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:885:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_rsh_i64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:932:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_arsh_i64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:980:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_mul_r64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:1026:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_ia32_mul_i64': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:68:24: note: in expansion of macro 'EMIT' #define EMIT2(b1, b2) EMIT((b1) + ((b2) << 8), 2) ^~~~ arch/x86/net/bpf_jit_comp32.c:76:7: note: in expansion of macro 'EMIT2' do { EMIT2(b1, b2); EMIT(off, 4); } while (0) ^~~~~ arch/x86/net/bpf_jit_comp32.c:1103:2: note: in expansion of macro 'EMIT2_off32' EMIT2_off32(0xC7, add_1reg(0xC0, IA32_EAX), val); ^~~~~~~~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_prologue': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:67:20: note: in expansion of macro 'EMIT' #define EMIT1(b1) EMIT(b1, 1) ^~~~ arch/x86/net/bpf_jit_comp32.c:1191:2: note: in expansion of macro 'EMIT1' EMIT1(0x55); ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_epilogue': >> arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:1231:2: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), STACK_VAR(r0[0])); ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_push_r64': arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:1375:2: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_ECX), STACK_VAR(src_hi)); ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_push_r32': arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:1392:2: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_ECX), STACK_VAR(src_lo)); ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'emit_kfunc_call': arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:69:27: note: in expansion of macro 'EMIT' #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3) ^~~~ arch/x86/net/bpf_jit_comp32.c:1588:3: note: in expansion of macro 'EMIT3' EMIT3(0x8B, add_2reg(0x40, IA32_EBP, *cur_arg_reg++), ^~~~~ arch/x86/net/bpf_jit_comp32.c: In function 'do_jit': arch/x86/net/bpf_jit_comp32.c:65:43: error: 'cnt' undeclared (first use in this function); did you mean 'int'? do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) ^ arch/x86/net/bpf_jit_comp32.c:68:24: note: in expansion of macro 'EMIT' #define EMIT2(b1, b2) EMIT((b1) + ((b2) << 8), 2) ^~~~ arch/x86/net/bpf_jit_comp32.c:76:7: note: in expansion of macro 'EMIT2' do { EMIT2(b1, b2); EMIT(off, 4); } while (0) ^~~~~ arch/x86/net/bpf_jit_comp32.c:1737:5: note: in expansion of macro 'EMIT2_off32' EMIT2_off32(0xC7, add_1reg(0xC0, IA32_ECX), ^~~~~~~~~~~ vim +65 arch/x86/net/bpf_jit_comp32.c 03f5781be2c7b7 Wang YanQing 2018-05-03 63 03f5781be2c7b7 Wang YanQing 2018-05-03 64 #define EMIT(bytes, len) \ 03f5781be2c7b7 Wang YanQing 2018-05-03 @65 do { prog = emit_code(prog, bytes, len); cnt += len; } while (0) 03f5781be2c7b7 Wang YanQing 2018-05-03 66 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
