Hi,

[auto build test ERROR on next-20160621]

url:    https://github.com/0day-ci/linux/commits/Martin-KaFai-Lau/cgroup-bpf-cgroup2-membership-test-on-skb/20160622-082800
config: sh-titan_defconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 5.3.1-8) 5.3.1 20160205
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=sh 

All errors (new ones prefixed by >>):

   net/core/filter.c: In function 'bpf_skb_in_cgroup':

quoted

net/core/filter.c:2049:9: error: implicit declaration of function 'cgroup_is_descendant' [-Werror=implicit-function-declaration]

     return cgroup_is_descendant(sock_cgroup_ptr(&sk->sk_cgrp_data), cgrp);
            ^
   net/core/filter.c:2049:30: error: implicit declaration of function 'sock_cgroup_ptr' [-Werror=implicit-function-declaration]
     return cgroup_is_descendant(sock_cgroup_ptr(&sk->sk_cgrp_data), cgrp);
                                 ^
   cc1: some warnings being treated as errors

vim +/cgroup_is_descendant +2049 net/core/filter.c

  2043			return -E2BIG;
  2044	
  2045		cgrp = READ_ONCE(array->ptrs[i]);
  2046		if (unlikely(!cgrp))
  2047			return -ENOENT;
  2048	

2049		return cgroup_is_descendant(sock_cgroup_ptr(&sk->sk_cgrp_data), cgrp);

  2050	}
  2051	
  2052	static const struct bpf_func_proto bpf_skb_in_cgroup_proto = {

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