Re: [PATCH 7/8] pipe: account to kmemcg

[kbuild test robot]

Hi,

[auto build test ERROR on next-20160520]
[cannot apply to tip/x86/core net-next/master v4.6-rc7 v4.6-rc6 v4.6-rc5 v4.6]
[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/Vladimir-Davydov/mm-remove-pointless-struct-in-struct-page-definition/20160523-182939
config: um-x86_64_defconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        # save the attached .config to linux build tree
        make ARCH=um SUBARCH=x86_64

Note: the linux-review/Vladimir-Davydov/mm-remove-pointless-struct-in-struct-page-definition/20160523-182939 HEAD 08a247942f52ec5444ba2a0d3c951358640eccf5 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   fs/built-in.o: In function `anon_pipe_buf_steal':
>> fs/pipe.c:147: undefined reference to `memcg_kmem_uncharge'
   collect2: error: ld returned 1 exit status

vim +147 fs/pipe.c

   141	static int anon_pipe_buf_steal(struct pipe_inode_info *pipe,
   142				       struct pipe_buffer *buf)
   143	{
   144		struct page *page = buf->page;
   145	
   146		if (page_count(page) == 1) {
 > 147			memcg_kmem_uncharge(page, 0);
   148			__ClearPageKmemcg(page);
   149			__SetPageLocked(page);
   150			return 0;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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