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Date: Thu, 13 Jun 2024 10:16:48 +0800
From: kernel test robot <lkp@...el.com>
To: kunyu <kunyu@...china.com>, davem@...emloft.net, dsahern@...nel.org,
udknight@...il.com, ast@...nel.org, daniel@...earbox.net,
andrii@...nel.org, martin.lau@...ux.dev, eddyz87@...il.com,
song@...nel.org, yonghong.song@...ux.dev, john.fastabend@...il.com,
kpsingh@...nel.org, sdf@...gle.com, haoluo@...gle.com,
jolsa@...nel.org, tglx@...utronix.de, mingo@...hat.com,
bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
hpa@...or.com
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
netdev@...r.kernel.org, bpf@...r.kernel.org,
linux-kernel@...r.kernel.org, kunyu <kunyu@...china.com>
Subject: Re: [PATCH] x86: net: bpf_jit_comp32: Remove unused 'cnt' variables
from most functions
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-004-20240613 (https://download.01.org/0day-ci/archive/20240613/202406130900.iANs9YtU-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240613/202406130900.iANs9YtU-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406130900.iANs9YtU-lkp@intel.com/
All errors (new ones prefixed by >>):
>> arch/x86/net/bpf_jit_comp32.c:214:4: error: use of undeclared identifier 'cnt'
214 | EMIT2(0x33, add_2reg(0xC0, IA32_EAX, IA32_EAX));
| ^
arch/x86/net/bpf_jit_comp32.c:68:24: note: expanded from macro 'EMIT2'
68 | #define EMIT2(b1, b2) EMIT((b1) + ((b2) << 8), 2)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:216:4: error: use of undeclared identifier 'cnt'
216 | EMIT3(0x89, add_2reg(0x40, IA32_EBP, IA32_EAX),
| ^
arch/x86/net/bpf_jit_comp32.c:69:27: note: expanded from macro 'EMIT3'
69 | #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:219:4: error: use of undeclared identifier 'cnt'
219 | EMIT3_off32(0xC7, add_1reg(0x40, IA32_EBP),
| ^
arch/x86/net/bpf_jit_comp32.c:78:7: note: expanded from macro 'EMIT3_off32'
78 | do { EMIT3(b1, b2, b3); EMIT(off, 4); } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:69:27: note: expanded from macro 'EMIT3'
69 | #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:219:4: error: use of undeclared identifier 'cnt'
arch/x86/net/bpf_jit_comp32.c:78:26: note: expanded from macro 'EMIT3_off32'
78 | do { EMIT3(b1, b2, b3); EMIT(off, 4); } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:224:4: error: use of undeclared identifier 'cnt'
224 | EMIT2(0x33, add_2reg(0xC0, dst, dst));
| ^
arch/x86/net/bpf_jit_comp32.c:68:24: note: expanded from macro 'EMIT2'
68 | #define EMIT2(b1, b2) EMIT((b1) + ((b2) << 8), 2)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:226:4: error: use of undeclared identifier 'cnt'
226 | EMIT2_off32(0xC7, add_1reg(0xC0, dst),
| ^
arch/x86/net/bpf_jit_comp32.c:76:7: note: expanded from macro 'EMIT2_off32'
76 | do { EMIT2(b1, b2); EMIT(off, 4); } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:68:24: note: expanded from macro 'EMIT2'
68 | #define EMIT2(b1, b2) EMIT((b1) + ((b2) << 8), 2)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:226:4: error: use of undeclared identifier 'cnt'
arch/x86/net/bpf_jit_comp32.c:76:22: note: expanded from macro 'EMIT2_off32'
76 | do { EMIT2(b1, b2); EMIT(off, 4); } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:241:3: error: use of undeclared identifier 'cnt'
241 | EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), STACK_VAR(src));
| ^
arch/x86/net/bpf_jit_comp32.c:69:27: note: expanded from macro 'EMIT3'
69 | #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:244:3: error: use of undeclared identifier 'cnt'
244 | EMIT3(0x89, add_2reg(0x40, IA32_EBP, sreg), STACK_VAR(dst));
| ^
arch/x86/net/bpf_jit_comp32.c:69:27: note: expanded from macro 'EMIT3'
69 | #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:247:3: error: use of undeclared identifier 'cnt'
247 | EMIT2(0x89, add_2reg(0xC0, dst, sreg));
| ^
arch/x86/net/bpf_jit_comp32.c:68:24: note: expanded from macro 'EMIT2'
68 | #define EMIT2(b1, b2) EMIT((b1) + ((b2) << 8), 2)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
arch/x86/net/bpf_jit_comp32.c:291:3: error: use of undeclared identifier 'cnt'
291 | EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_ECX), STACK_VAR(src));
| ^
arch/x86/net/bpf_jit_comp32.c:69:27: note: expanded from macro 'EMIT3'
69 | #define EMIT3(b1, b2, b3) EMIT((b1) + ((b2) << 8) + ((b3) << 16), 3)
| ^
arch/x86/net/bpf_jit_comp32.c:65:43: note: expanded from macro 'EMIT'
65 | do { prog = emit_code(prog, bytes, len); cnt += len; } while (0)
| ^
vim +/cnt +214 arch/x86/net/bpf_jit_comp32.c
03f5781be2c7b7 Wang YanQing 2018-05-03 205
03f5781be2c7b7 Wang YanQing 2018-05-03 206 static inline void emit_ia32_mov_i(const u8 dst, const u32 val, bool dstk,
03f5781be2c7b7 Wang YanQing 2018-05-03 207 u8 **pprog)
03f5781be2c7b7 Wang YanQing 2018-05-03 208 {
03f5781be2c7b7 Wang YanQing 2018-05-03 209 u8 *prog = *pprog;
03f5781be2c7b7 Wang YanQing 2018-05-03 210
03f5781be2c7b7 Wang YanQing 2018-05-03 211 if (dstk) {
03f5781be2c7b7 Wang YanQing 2018-05-03 212 if (val == 0) {
03f5781be2c7b7 Wang YanQing 2018-05-03 213 /* xor eax,eax */
03f5781be2c7b7 Wang YanQing 2018-05-03 @214 EMIT2(0x33, add_2reg(0xC0, IA32_EAX, IA32_EAX));
03f5781be2c7b7 Wang YanQing 2018-05-03 215 /* mov dword ptr [ebp+off],eax */
03f5781be2c7b7 Wang YanQing 2018-05-03 216 EMIT3(0x89, add_2reg(0x40, IA32_EBP, IA32_EAX),
03f5781be2c7b7 Wang YanQing 2018-05-03 217 STACK_VAR(dst));
03f5781be2c7b7 Wang YanQing 2018-05-03 218 } else {
03f5781be2c7b7 Wang YanQing 2018-05-03 219 EMIT3_off32(0xC7, add_1reg(0x40, IA32_EBP),
03f5781be2c7b7 Wang YanQing 2018-05-03 220 STACK_VAR(dst), val);
03f5781be2c7b7 Wang YanQing 2018-05-03 221 }
03f5781be2c7b7 Wang YanQing 2018-05-03 222 } else {
03f5781be2c7b7 Wang YanQing 2018-05-03 223 if (val == 0)
03f5781be2c7b7 Wang YanQing 2018-05-03 224 EMIT2(0x33, add_2reg(0xC0, dst, dst));
03f5781be2c7b7 Wang YanQing 2018-05-03 225 else
03f5781be2c7b7 Wang YanQing 2018-05-03 226 EMIT2_off32(0xC7, add_1reg(0xC0, dst),
03f5781be2c7b7 Wang YanQing 2018-05-03 227 val);
03f5781be2c7b7 Wang YanQing 2018-05-03 228 }
03f5781be2c7b7 Wang YanQing 2018-05-03 229 *pprog = prog;
03f5781be2c7b7 Wang YanQing 2018-05-03 230 }
03f5781be2c7b7 Wang YanQing 2018-05-03 231
--
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https://github.com/intel/lkp-tests/wiki
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