Re: [RFC bpf-next 03/11] bpf: shared BPF/native kfuncs

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

Hi Eduard,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

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

url:    https://github.com/intel-lab-lkp/linux/commits/Eduard-Zingerman/bpf-use-branch-predictions-in-opt_hard_wire_dead_code_branches/20241108-015243
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20241107175040.1659341-4-eddyz87%40gmail.com
patch subject: [RFC bpf-next 03/11] bpf: shared BPF/native kfuncs
config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20241108/202411080908.XHv8PmQG-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241108/202411080908.XHv8PmQG-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/202411080908.XHv8PmQG-lkp@intel.com/

All warnings (new ones prefixed by >>):

   kernel/bpf/verifier.c: In function 'inlinable_kfuncs_init':
>> kernel/bpf/verifier.c:20910:46: warning: taking address of expression of type 'void'
   20910 |         return bpf_register_inlinable_kfuncs(&inlinable_kfuncs_data,
         |                                              ^
   kernel/bpf/verifier.c:20911:44: warning: taking address of expression of type 'void'
   20911 |                                            &inlinable_kfuncs_data_end - &inlinable_kfuncs_data);
         |                                            ^
   kernel/bpf/verifier.c:20911:73: warning: taking address of expression of type 'void'
   20911 |                                            &inlinable_kfuncs_data_end - &inlinable_kfuncs_data);
         |                                                                         ^
   /tmp/cccS126M.s: Assembler messages:
>> /tmp/cccS126M.s:12: Warning: ignoring changed section attributes for .data
   /tmp/cccS126M.s:15: Error: file not found: kernel/bpf/inlinable_kfuncs.bpf.linked.o


vim +/void +20910 kernel/bpf/verifier.c

 20907	
 20908	static int __init inlinable_kfuncs_init(void)
 20909	{
 20910		return bpf_register_inlinable_kfuncs(&inlinable_kfuncs_data,
 20911						   &inlinable_kfuncs_data_end - &inlinable_kfuncs_data);
 20912	}
 20913	

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