tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   736b6d81d93cf61a0601af90bd552103ef997b3f
commit: fda01efc61605af7c6fa03c4109f14d59c9228b7 [9653/10068] bpf: Enable cgroups to be used as kptrs
config: x86_64-randconfig-a006-20221121
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=fda01efc61605af7c6fa03c4109f14d59c9228b7
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout fda01efc61605af7c6fa03c4109f14d59c9228b7
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/bpf/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> kernel/bpf/helpers.c:2005:40: warning: multiple unsequenced modifications to 'idx' [-Wunsequenced]
                           .btf_id       = generic_dtor_ids[idx++],
                                                               ^
   1 warning generated.


vim +/idx +2005 kernel/bpf/helpers.c

  1999	
  2000	static int __init kfunc_init(void)
  2001	{
  2002		int ret, idx = 0;
  2003		const struct btf_id_dtor_kfunc generic_dtors[] = {
  2004			{
> 2005				.btf_id       = generic_dtor_ids[idx++],
  2006				.kfunc_btf_id = generic_dtor_ids[idx++]
  2007			},
  2008	#ifdef CONFIG_CGROUPS
  2009			{
  2010				.btf_id       = generic_dtor_ids[idx++],
  2011				.kfunc_btf_id = generic_dtor_ids[idx++]
  2012			},
  2013	#endif
  2014		};
  2015	
  2016		ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &generic_kfunc_set);
  2017		ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &generic_kfunc_set);
  2018		ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &generic_kfunc_set);
  2019		ret = ret ?: register_btf_id_dtor_kfuncs(generic_dtors,
  2020							  ARRAY_SIZE(generic_dtors),
  2021							  THIS_MODULE);
  2022		return ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_UNSPEC, &common_kfunc_set);
  2023	}
  2024	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp