[rgushchin:memcontrol_v1.1 3/3] mm/internal.h:1542:38: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration

[rgushchin:memcontrol_v1.1 3/3] mm/internal.h:1542:38: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration

[kernel test robot]

tree:   https://github.com/rgushchin/linux.git memcontrol_v1.1
head:   c5d0efd9ad4acbcf666aed6e47e15d1feefa4ff0
commit: c5d0efd9ad4acbcf666aed6e47e15d1feefa4ff0 [3/3] mm: memcg: move charge migration code to memcontrol-v1.c
config: openrisc-allnoconfig (https://download.01.org/0day-ci/archive/20240504/202405041100.RZRTURAx-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240504/202405041100.RZRTURAx-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/202405041100.RZRTURAx-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from mm/filemap.c:51:
>> mm/internal.h:1542:38: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration
    1542 | void mem_cgroup_cancel_attach(struct cgroup_taskset *tset);
         |                                      ^~~~~~~~~~~~~~
   mm/internal.h:1543:34: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration
    1543 | int mem_cgroup_can_attach(struct cgroup_taskset *tset);
         |                                  ^~~~~~~~~~~~~~
>> mm/internal.h:1545:40: warning: 'struct cftype' declared inside parameter list will not be visible outside of this definition or declaration
    1545 |                                 struct cftype *cft);
         |                                        ^~~~~~
   mm/internal.h:1547:41: warning: 'struct cftype' declared inside parameter list will not be visible outside of this definition or declaration
    1547 |                                  struct cftype *cft, u64 val);
         |                                         ^~~~~~
--
   In file included from mm/page-writeback.c:43:
>> mm/internal.h:1542:38: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration
    1542 | void mem_cgroup_cancel_attach(struct cgroup_taskset *tset);
         |                                      ^~~~~~~~~~~~~~
   mm/internal.h:1543:34: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration
    1543 | int mem_cgroup_can_attach(struct cgroup_taskset *tset);
         |                                  ^~~~~~~~~~~~~~
>> mm/internal.h:1545:40: warning: 'struct cftype' declared inside parameter list will not be visible outside of this definition or declaration
    1545 |                                 struct cftype *cft);
         |                                        ^~~~~~
   mm/internal.h:1547:41: warning: 'struct cftype' declared inside parameter list will not be visible outside of this definition or declaration
    1547 |                                  struct cftype *cft, u64 val);
         |                                         ^~~~~~
   mm/page-writeback.c: In function 'cgwb_calc_thresh':
   mm/page-writeback.c:900:39: warning: variable 'gdtc' set but not used [-Wunused-but-set-variable]
     900 |         struct dirty_throttle_control gdtc = { GDTC_INIT_NO_WB };
         |                                       ^~~~
--
   In file included from mm/slub.c:49:
>> mm/internal.h:1542:38: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration
    1542 | void mem_cgroup_cancel_attach(struct cgroup_taskset *tset);
         |                                      ^~~~~~~~~~~~~~
   mm/internal.h:1543:34: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration
    1543 | int mem_cgroup_can_attach(struct cgroup_taskset *tset);
         |                                  ^~~~~~~~~~~~~~
>> mm/internal.h:1545:40: warning: 'struct cftype' declared inside parameter list will not be visible outside of this definition or declaration
    1545 |                                 struct cftype *cft);
         |                                        ^~~~~~
   mm/internal.h:1547:41: warning: 'struct cftype' declared inside parameter list will not be visible outside of this definition or declaration
    1547 |                                  struct cftype *cft, u64 val);
         |                                         ^~~~~~
   mm/slub.c: In function 'slab_post_alloc_hook':
   mm/slub.c:3831:29: warning: variable 'obj_exts' set but not used [-Wunused-but-set-variable]
    3831 |         struct slabobj_ext *obj_exts;
         |                             ^~~~~~~~


vim +1542 mm/internal.h

  1540	
  1541	void mem_cgroup_move_task(void);
> 1542	void mem_cgroup_cancel_attach(struct cgroup_taskset *tset);
  1543	int mem_cgroup_can_attach(struct cgroup_taskset *tset);
  1544	u64 mem_cgroup_move_charge_read(struct cgroup_subsys_state *css,
> 1545					struct cftype *cft);
  1546	int mem_cgroup_move_charge_write(struct cgroup_subsys_state *css,
  1547					 struct cftype *cft, u64 val);
  1548	void __folio_memcg_unlock(struct mem_cgroup *memcg);
  1549	bool mem_cgroup_wait_acct_move(struct mem_cgroup *memcg);
  1550	void mem_cgroup_charge_statistics(struct mem_cgroup *memcg, int nr_pages);
  1551	void memcg_check_events(struct mem_cgroup *memcg, int nid);
  1552	void __maybe_unused mem_cgroup_id_get_many(struct mem_cgroup *memcg,
  1553						   unsigned int n);
  1554	void mem_cgroup_id_put_many(struct mem_cgroup *memcg, unsigned int n);
  1555	void memcg_oom_recover(struct mem_cgroup *memcg);
  1556	

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