Re: [PATCH 3/5] Memcgroup:add a global work

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

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Hi Xiongchun,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.0-rc2 next-20190116]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Xiongchun-Duan/Memcgroup-force-empty-after-memcgroup-offline/20190122-014721
config: i386-randconfig-x010-201903 (attached as .config)
compiler: gcc-8 (Debian 8.2.0-14) 8.2.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   mm/memcontrol.c: In function 'empty_timer_trigger':
>> mm/memcontrol.c:4585:13: error: 'memcg_force_empty_wq' undeclared (first use in this function); did you mean 'mem_cgroup_force_empty'?
     queue_work(memcg_force_empty_wq, &timer_poll_work);
                ^~~~~~~~~~~~~~~~~~~~
                mem_cgroup_force_empty
   mm/memcontrol.c:4585:13: note: each undeclared identifier is reported only once for each function it appears in
   mm/memcontrol.c: In function 'mem_cgroup_init':
   mm/memcontrol.c:6400:2: error: 'memcg_force_empty_wq' undeclared (first use in this function); did you mean 'mem_cgroup_force_empty'?
     memcg_force_empty_wq = alloc_workqueue("memcg_force_empty_wq", 0, 1);
     ^~~~~~~~~~~~~~~~~~~~
     mem_cgroup_force_empty

vim +4585 mm/memcontrol.c

  4582	
  4583	static void empty_timer_trigger(struct timer_list *t)
  4584	{
> 4585		queue_work(memcg_force_empty_wq, &timer_poll_work);
  4586	}
  4587	

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