[peterz-queue:sched/core-sched 27/29] kernel/sched/core.c:5731:90: error: variable has incomplete type 'struct task_group'

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

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core-sched
head:   a2f7c8bee1740fc80a75734268b065c96d68d29b
commit: 520bf37d416584c0aca5a190d922d4db145e5d91 [27/29] sched: Cgroup core-scheduling interface
config: riscv-randconfig-r025-20210413 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45)
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
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=520bf37d416584c0aca5a190d922d4db145e5d91
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue sched/core-sched
        git checkout 520bf37d416584c0aca5a190d922d4db145e5d91
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 

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

All errors (new ones prefixed by >>):

>> kernel/sched/core.c:5731:90: error: variable has incomplete type 'struct task_group'
   static inline void sched_core_cgroup_online(struct task_group *parent, struct task_group tg) { }
                                                                                            ^
   include/linux/sched.h:67:8: note: forward declaration of 'struct task_group'
   struct task_group;
          ^
   1 error generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for LOCKDEP
   Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
   Selected by
   - PROVE_LOCKING && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
   - LOCK_STAT && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
   - DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT


vim +5731 kernel/sched/core.c

  5729	
  5730	static inline void sched_core_cgroup_free(struct task_group *tg) { }
> 5731	static inline void sched_core_cgroup_online(struct task_group *parent, struct task_group tg) { }
  5732	

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

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