[rgushchin:bpfsched.rfc 3/7] kernel/sched/bpf_sched.c:71:10: error: implicit declaration of function 'task_dfl_cgroup'

[rgushchin:bpfsched.rfc 3/7] kernel/sched/bpf_sched.c:71:10: error: implicit declaration of function 'task_dfl_cgroup'

[kernel test robot]

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tree:   https://github.com/rgushchin/linux.git bpfsched.rfc
head:   f4c466accae6c27a4fbece80f8cec431f685a20c
commit: 1bd61b2c1899a1a9e8ba44e9ac2958dea9847d82 [3/7] bpf: sched: add convenient helpers to identify sched entities
config: hexagon-randconfig-r002-20210915 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 8cbbd7e0b2aa21ce7e416cfb63d9965518948c35)
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://github.com/rgushchin/linux/commit/1bd61b2c1899a1a9e8ba44e9ac2958dea9847d82
        git remote add rgushchin https://github.com/rgushchin/linux.git
        git fetch --no-tags rgushchin bpfsched.rfc
        git checkout 1bd61b2c1899a1a9e8ba44e9ac2958dea9847d82
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon 

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

All error/warnings (new ones prefixed by >>):

>> kernel/sched/bpf_sched.c:71:10: error: implicit declaration of function 'task_dfl_cgroup' [-Werror,-Wimplicit-function-declaration]
                   cgrp = task_dfl_cgroup(task_of(se));
                          ^
   kernel/sched/bpf_sched.c:71:10: note: did you mean 'task_group'?
   kernel/sched/sched.h:1912:34: note: 'task_group' declared here
   static inline struct task_group *task_group(struct task_struct *p)
                                    ^
>> kernel/sched/bpf_sched.c:71:8: warning: incompatible integer to pointer conversion assigning to 'struct cgroup *' from 'int' [-Wint-conversion]
                   cgrp = task_dfl_cgroup(task_of(se));
                        ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/sched/bpf_sched.c:77:19: error: incomplete definition of type 'struct cgroup'
           for (level = cgrp->level; level; level--)
                        ~~~~^
   include/linux/sched/task.h:35:9: note: forward declaration of 'struct cgroup'
           struct cgroup *cgrp;
                  ^
   kernel/sched/bpf_sched.c:78:11: error: incomplete definition of type 'struct cgroup'
                   if (cgrp->ancestor_ids[level] == cgrpid)
                       ~~~~^
   include/linux/sched/task.h:35:9: note: forward declaration of 'struct cgroup'
           struct cgroup *cgrp;
                  ^
   1 warning and 3 errors generated.


vim +/task_dfl_cgroup +71 kernel/sched/bpf_sched.c

    63	
    64	BPF_CALL_2(bpf_sched_entity_belongs_to_cgrp, struct sched_entity *, se,
    65		   u64, cgrpid)
    66	{
    67		struct cgroup *cgrp;
    68		int level;
    69	
    70		if (entity_is_task(se))
  > 71			cgrp = task_dfl_cgroup(task_of(se));
    72	#ifdef CONFIG_FAIR_GROUP_SCHED
    73		else
    74			cgrp = se->cfs_rq->tg->css.cgroup;
    75	#endif
    76	
  > 77		for (level = cgrp->level; level; level--)
    78			if (cgrp->ancestor_ids[level] == cgrpid)
    79				return 1;
    80	
    81		return 0;
    82	}
    83	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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