[mmotm:master 240/250] fs/notify/group.c:41:24: error: dereferencing pointer to incomplete type 'struct mem_cgroup'

* [mmotm:master 240/250] fs/notify/group.c:41:24: error: dereferencing pointer to incomplete type 'struct mem_cgroup'
@ 2018-03-08  2:34 kbuild test robot
  0 siblings, 0 replies; only message in thread
From: kbuild test robot @ 2018-03-08  2:34 UTC (permalink / raw)
  To: Shakeel Butt
  Cc: kbuild-all, Johannes Weiner, Andrew Morton, Linux Memory Management List

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tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   37ec9d8b887635603a859a06aa0406342b1068d8
commit: 2f3ec8cccd4f452b30e98b7130b7b1a9b0535656 [240/250] fs: fsnotify: account fsnotify metadata to kmemcg
config: i386-randconfig-n0-201809 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout 2f3ec8cccd4f452b30e98b7130b7b1a9b0535656
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   fs/notify/group.c: In function 'fsnotify_final_destroy_group':
>> fs/notify/group.c:41:24: error: dereferencing pointer to incomplete type 'struct mem_cgroup'
      css_put(&group->memcg->css);
                           ^~

vim +41 fs/notify/group.c

    31	
    32	/*
    33	 * Final freeing of a group
    34	 */
    35	static void fsnotify_final_destroy_group(struct fsnotify_group *group)
    36	{
    37		if (group->ops->free_group_priv)
    38			group->ops->free_group_priv(group);
    39	
    40		if (group->memcg)
  > 41			css_put(&group->memcg->css);
    42	
    43		kfree(group);
    44	}
    45	

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