Re: [PATCH] libbpf: add SIB addressing mode support for x86-64 USDT arguments

[kernel test robot <lkp@intel.com>]

Hi Jiawei,

kernel test robot noticed the following build errors:

[auto build test ERROR on bpf-next/net]
[also build test ERROR on bpf-next/master bpf/master linus/master v6.16 next-20250729]
[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/Jiawei-Zhao/libbpf-add-SIB-addressing-mode-support-for-x86-64-USDT-arguments/20250729-205449
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git net
patch link:    https://lore.kernel.org/r/20250729125244.28364-1-Phoenix500526%40163.com
patch subject: [PATCH] libbpf: add SIB addressing mode support for x86-64 USDT arguments
config: arm-randconfig-001-20250730 (https://download.01.org/0day-ci/archive/20250730/202507301122.2gtH7n4r-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project bcd0d972247154336dd1321f1fded818e46671d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250730/202507301122.2gtH7n4r-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507301122.2gtH7n4r-lkp@intel.com/

All errors (new ones prefixed by >>):

>> usdt.c:1301:7: error: mixing declarations and code is a C99 extension [-Werror,-Wdeclaration-after-statement]
    1301 |                 int idx_reg_off = calc_pt_regs_off(idx_reg_name);
         |                     ^
   1 error generated.
   make[6]: *** [tools/build/Makefile.build:85: tools/bpf/resolve_btfids/libbpf/staticobjs/usdt.o] Error 1 shuffle=2731265819
   make[6]: Target '__build' not remade because of errors.
   make[5]: *** [Makefile:152: tools/bpf/resolve_btfids/libbpf/staticobjs/libbpf-in.o] Error 2 shuffle=2731265819
   make[5]: Target 'tools/bpf/resolve_btfids/libbpf/libbpf.a' not remade because of errors.
   make[4]: *** [Makefile:61: tools/bpf/resolve_btfids//libbpf/libbpf.a] Error 2 shuffle=2731265819
   make[4]: Target 'all' not remade because of errors.
   make[3]: *** [Makefile:76: bpf/resolve_btfids] Error 2 shuffle=2731265819
   make[2]: *** [Makefile:1443: tools/bpf/resolve_btfids] Error 2 shuffle=2731265819
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2 shuffle=2731265819
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2 shuffle=2731265819
   make: Target 'prepare' not remade because of errors.

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