[anolis-intel-cloud:devel-6.6 272/272] kernel/sched/fair.c:9774:69: warning: 'struct lb_env' declared inside parameter list will not be visible outside of this definition or declaration

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

Hi Cruz,

FYI, the error/warning still remains.

tree:   https://gitee.com/anolis/intel-cloud-kernel.git devel-6.6
head:   41cf029dd674935312f07b9ff27127f205008195
commit: 64194706630f8c78feb5fb01b6d046aa4aab66df [272/272] anolis: sched: add tunables for expeller and expellee load balance
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20260830/202608301009.JSDb3U23-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.4.0-5) 12.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260830/202608301009.JSDb3U23-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/202608301009.JSDb3U23-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from kernel/sched/fair.c:56:
   kernel/sched/sched.h:1859:54: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration
    1859 | static inline void sched_core_identity_attach(struct cgroup_taskset *tset) { }
         |                                                      ^~~~~~~~~~~~~~
>> kernel/sched/fair.c:9774:69: warning: 'struct lb_env' declared inside parameter list will not be visible outside of this definition or declaration
    9774 | static inline int id_can_migrate_task(struct task_struct *p, struct lb_env *env)
         |                                                                     ^~~~~~


vim +9774 kernel/sched/fair.c

  9740	
  9741	#else
  9742	static inline void push_expellee(struct rq *rq) { }
  9743	#endif
  9744	static int id_can_migrate_task(struct task_struct *p, struct lb_env *env)
  9745	{
  9746		struct rq *src_rq = env->src_rq;
  9747		struct rq *dst_rq = env->dst_rq;
  9748	
  9749		if (!id_expeller_share_core() && env->id_need_redo && task_is_expeller(p) &&
  9750		    rq_on_expel_by_smt_expeller(dst_rq))
  9751			goto bad_dst;
  9752		if ((!sched_feat(ID_SMT_EXPEL) || !task_is_expellee(p)) &&
  9753		    (!sched_feat(ID_ABSOLUTE_EXPEL) || !task_is_idle(p)))
  9754			return -1;
  9755		/* Do not migrate expellee task to CPU on expel */
  9756		if (should_expel_se(dst_rq, &p->se))
  9757			goto bad_dst;
  9758		if (sched_feat(ID_EXPELLEE_NEVER_HOT))
  9759			goto good_dst;
  9760		if (!should_expel_se(src_rq, &p->se))
  9761			return -1;
  9762		if (!sched_feat(ID_RESCUE_EXPELLEE))
  9763			return -1;
  9764	good_dst:
  9765		schedstat_inc(p->stats.nr_forced_migrations);
  9766		return 1;
  9767	bad_dst:
  9768		schedstat_inc(p->stats.nr_failed_migrations_id);
  9769		return 0;
  9770	}
  9771	#else
  9772	static inline void update_rq_on_expel(struct rq *rq) { }
  9773	static inline void push_expellee(struct rq *rq) { }
> 9774	static inline int id_can_migrate_task(struct task_struct *p, struct lb_env *env)
  9775	{
  9776		return -1;
  9777	}
  9778	#endif
  9779	

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