[tip:sched/core 93/94] kernel/sched/fair.c:2658:9: warning: 'struct sched_domain' declared inside parameter list

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
head:   815abf5af45f04f759f12f3172afd15226fd7f71
commit: 3fed382b46baac83703130fe4cd3d9147f427fb9 [93/94] sched/numa: Implement NUMA node level wake_affine()
config: m68k-sun3_defconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 4.9.0
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 3fed382b46baac83703130fe4cd3d9147f427fb9
        # save the attached .config to linux build tree
        make.cross ARCH=m68k 

All warnings (new ones prefixed by >>):

>> kernel/sched/fair.c:2658:9: warning: 'struct sched_domain' declared inside parameter list
            int prev_cpu, int sync)
            ^
>> kernel/sched/fair.c:2658:9: warning: its scope is only this definition or declaration, which is probably not what you want

vim +2658 kernel/sched/fair.c

  2642	}
  2643	#else
  2644	static void task_tick_numa(struct rq *rq, struct task_struct *curr)
  2645	{
  2646	}
  2647	
  2648	static inline void account_numa_enqueue(struct rq *rq, struct task_struct *p)
  2649	{
  2650	}
  2651	
  2652	static inline void account_numa_dequeue(struct rq *rq, struct task_struct *p)
  2653	{
  2654	}
  2655	
  2656	static inline bool numa_wake_affine(struct sched_domain *sd,
  2657					    struct task_struct *p, int this_cpu,
> 2658					    int prev_cpu, int sync)
  2659	{
  2660		return true;
  2661	}
  2662	#endif /* CONFIG_NUMA_BALANCING */
  2663	
  2664	static void
  2665	account_entity_enqueue(struct cfs_rq *cfs_rq, struct sched_entity *se)
  2666	{

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