[openeuler:OLK-6.6 3278/3278] include/linux/xsched.h:309:28: error: array type has incomplete element type 'struct cgroup_file'

[openeuler:OLK-6.6 3278/3278] include/linux/xsched.h:309:28: error: array type has incomplete element type 'struct cgroup_file'

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   dfb9bd9242c2350c127d51a126976ed386e9cc48
commit: aafde051ac61687823976cc892fb3c416101d694 [3278/3278] xsched: Add support for CFS quota for cgroups
config: arm64-allnoconfig (https://download.01.org/0day-ci/archive/20251119/202511192040.YIPXCVFH-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251119/202511192040.YIPXCVFH-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/202511192040.YIPXCVFH-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/xsched/vstream.c:23:
   include/linux/xsched.h:276:36: error: field 'css' has incomplete type
     276 |         struct cgroup_subsys_state css;
         |                                    ^~~
>> include/linux/xsched.h:309:28: error: array type has incomplete element type 'struct cgroup_file'
     309 |         struct cgroup_file xcu_file[NR_XCU_FILE_TYPES];
         |                            ^~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for ARCH_SUPPORTS_SCHED_SOFT_QUOTA
   Depends on [n]: CGROUPS [=n]
   Selected by [y]:
   - ARM64 [=y]
   WARNING: unmet direct dependencies detected for HALTPOLL_CPUIDLE
   Depends on [n]: CPU_IDLE [=n] && ARCH_CPUIDLE_HALTPOLL [=y] && ARCH_HAS_OPTIMIZED_POLL [=y]
   Selected by [y]:
   - ARM64 [=y]


vim +309 include/linux/xsched.h

   272	
   273	/* Xsched scheduling control group */
   274	struct xsched_group {
   275		/* Cgroups controller structure */
   276		struct cgroup_subsys_state css;
   277	
   278		/* Control group settings: */
   279		int sched_class;
   280		int prio;
   281	
   282		/* Bandwidth setting: shares value set by user */
   283		u64 shares_cfg;
   284		u64 shares_cfg_red;
   285		u32 weight;
   286		u64 children_shares_sum;
   287	
   288		/* Bandwidth setting: maximal quota in period */
   289		s64 quota;
   290		/* record the runtime of operators during the period */
   291		s64 runtime;
   292		s64 period;
   293		struct hrtimer quota_timeout;
   294		struct work_struct refill_work;
   295	
   296		struct xsched_group_xcu_priv perxcu_priv[XSCHED_NR_CUS];
   297	
   298		/* Groups hierarchcy */
   299		struct xsched_group *parent;
   300		struct list_head children_groups;
   301		struct list_head group_node;
   302	
   303		spinlock_t lock;
   304	
   305		/* for XSE to move in perxcu */
   306		struct list_head members;
   307	
   308		/* to control the xcu.{period, quota, shares} files shown or not */
 > 309		struct cgroup_file xcu_file[NR_XCU_FILE_TYPES];
   310		struct work_struct file_show_work;
   311	};
   312	

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