Re: [PATCH v2 bpf-next 1/4] bpf: add special internal-only MOV instruction to resolve per-CPU addrs

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

Hi Andrii,

kernel test robot noticed the following build errors:

[auto build test ERROR on bpf-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Andrii-Nakryiko/bpf-add-special-internal-only-MOV-instruction-to-resolve-per-CPU-addrs/20240402-101450
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20240402021307.1012571-2-andrii%40kernel.org
patch subject: [PATCH v2 bpf-next 1/4] bpf: add special internal-only MOV instruction to resolve per-CPU addrs
config: x86_64-randconfig-006-20240404 (https://download.01.org/0day-ci/archive/20240404/202404040813.q1PD4knu-lkp@intel.com/config)
compiler: gcc-10 (Ubuntu 10.5.0-1ubuntu1) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240404/202404040813.q1PD4knu-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/202404040813.q1PD4knu-lkp@intel.com/

All errors (new ones prefixed by >>):

   ld: arch/x86/net/bpf_jit_comp.o: in function `emit_code':
>> arch/x86/net/bpf_jit_comp.c:31:(.text+0xf2c3): undefined reference to `this_cpu_off'


vim +31 arch/x86/net/bpf_jit_comp.c

f18b03fabaa9b7 Kumar Kartikeya Dwivedi 2023-09-13  23  
5cccc702fd54e5 Joe Perches             2014-12-04  24  static u8 *emit_code(u8 *ptr, u32 bytes, unsigned int len)
0a14842f5a3c0e Eric Dumazet            2011-04-20  25  {
0a14842f5a3c0e Eric Dumazet            2011-04-20  26  	if (len == 1)
0a14842f5a3c0e Eric Dumazet            2011-04-20  27  		*ptr = bytes;
0a14842f5a3c0e Eric Dumazet            2011-04-20  28  	else if (len == 2)
0a14842f5a3c0e Eric Dumazet            2011-04-20  29  		*(u16 *)ptr = bytes;
0a14842f5a3c0e Eric Dumazet            2011-04-20  30  	else {
0a14842f5a3c0e Eric Dumazet            2011-04-20 @31  		*(u32 *)ptr = bytes;
0a14842f5a3c0e Eric Dumazet            2011-04-20  32  		barrier();
0a14842f5a3c0e Eric Dumazet            2011-04-20  33  	}
0a14842f5a3c0e Eric Dumazet            2011-04-20  34  	return ptr + len;
0a14842f5a3c0e Eric Dumazet            2011-04-20  35  }
0a14842f5a3c0e Eric Dumazet            2011-04-20  36  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki