tree:   https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git bpf_tramp
head:   eb9b9dcbc8ed96e479f5d62aa97c0c2c4b23beeb
commit: eb9b9dcbc8ed96e479f5d62aa97c0c2c4b23beeb [20/20] bpf: annotate context types
config: x86_64-randconfig-s0-201945 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.2-10+deb8u1) 4.9.2
reproduce:
        git checkout eb9b9dcbc8ed96e479f5d62aa97c0c2c4b23beeb
        # save the attached .config to linux build tree
        make ARCH=x86_64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>):

>> net/core/filter.c:8691:9: warning: 'struct sk_reuseport_kern' declared inside parameter list
            u32 hash)
            ^
>> net/core/filter.c:8691:9: warning: its scope is only this definition or declaration, which is probably not what you want
   net/core/filter.c: In function 'bpf_init_reuseport_kern':
>> net/core/filter.c:8693:12: error: dereferencing pointer to incomplete type
     reuse_kern->skb = skb;
               ^
   net/core/filter.c:8694:12: error: dereferencing pointer to incomplete type
     reuse_kern->sk = sk;
               ^
   net/core/filter.c:8695:12: error: dereferencing pointer to incomplete type
     reuse_kern->selected_sk = NULL;
               ^
   net/core/filter.c:8696:12: error: dereferencing pointer to incomplete type
     reuse_kern->data_end = skb->data + skb_headlen(skb);
               ^
   net/core/filter.c:8697:12: error: dereferencing pointer to incomplete type
     reuse_kern->hash = hash;
               ^
   net/core/filter.c:8698:12: error: dereferencing pointer to incomplete type
     reuse_kern->reuseport_id = reuse->reuseport_id;
               ^
   net/core/filter.c:8699:12: error: dereferencing pointer to incomplete type
     reuse_kern->bind_inany = reuse->bind_inany;
               ^
   net/core/filter.c: In function 'bpf_run_sk_reuseport':
   net/core/filter.c:8706:27: error: storage size of 'reuse_kern' isn't known
     struct sk_reuseport_kern reuse_kern;
                              ^
   net/core/filter.c:8706:27: warning: unused variable 'reuse_kern' [-Wunused-variable]
   In file included from include/net/sock.h:59:0,
                    from include/linux/sock_diag.h:8,
                    from net/core/filter.c:25:
   net/core/filter.c: At top level:
   net/core/filter.c:8719:12: warning: 'struct sk_reuseport_kern' declared inside parameter list
        struct bpf_map *, map, void *, key, u32, flags)
               ^
   include/linux/filter.h:460:31: note: in definition of macro '__BPF_DECL_ARGS'
    #define __BPF_DECL_ARGS(t, a) t   a
                                  ^
>> include/linux/filter.h:439:47: note: in expansion of macro '__BPF_MAP_3'
    #define __BPF_MAP_4(m, v, t, a, ...) m(t, a), __BPF_MAP_3(m, v, __VA_ARGS__)
                                                  ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_4'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:469:17: note: in expansion of macro '__BPF_MAP'
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__));   \
                    ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8718:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_select_reuseport, struct sk_reuseport_kern *, reuse_kern,
    ^
   net/core/filter.c:8719:12: warning: 'struct sk_reuseport_kern' declared inside parameter list
        struct bpf_map *, map, void *, key, u32, flags)
               ^
   include/linux/filter.h:460:31: note: in definition of macro '__BPF_DECL_ARGS'
    #define __BPF_DECL_ARGS(t, a) t   a
                                  ^
>> include/linux/filter.h:439:47: note: in expansion of macro '__BPF_MAP_3'
    #define __BPF_MAP_4(m, v, t, a, ...) m(t, a), __BPF_MAP_3(m, v, __VA_ARGS__)
                                                  ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_4'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:470:28: note: in expansion of macro '__BPF_MAP'
     typedef u64 (*btf_##name)(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__)); \
                               ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8718:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_select_reuseport, struct sk_reuseport_kern *, reuse_kern,
    ^
   net/core/filter.c: In function 'sk_select_reuseport':
>> include/linux/filter.h:453:2: warning: passing argument 1 of '(u64 (*)(struct sk_reuseport_kern *, struct bpf_map *, void *, u32))&____sk_select_reuseport' from incompatible pointer type
     (__force t)              \
     ^
   include/linux/filter.h:439:38: note: in expansion of macro '__BPF_CAST'
    #define __BPF_MAP_4(m, v, t, a, ...) m(t, a), __BPF_MAP_3(m, v, __VA_ARGS__)
                                         ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_4'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:474:35: note: in expansion of macro '__BPF_MAP'
      return ((btf_##name)____##name)(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
                                      ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8718:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_select_reuseport, struct sk_reuseport_kern *, reuse_kern,
    ^
   include/linux/filter.h:453:2: note: expected 'struct sk_reuseport_kern *' but argument is of type 'struct sk_reuseport_kern *'
     (__force t)              \
     ^
   include/linux/filter.h:439:38: note: in expansion of macro '__BPF_CAST'
    #define __BPF_MAP_4(m, v, t, a, ...) m(t, a), __BPF_MAP_3(m, v, __VA_ARGS__)
                                         ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_4'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:474:35: note: in expansion of macro '__BPF_MAP'
      return ((btf_##name)____##name)(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
                                      ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8718:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_select_reuseport, struct sk_reuseport_kern *, reuse_kern,
    ^
   include/linux/filter.h:474:10: warning: function called through a non-compatible type
      return ((btf_##name)____##name)(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
             ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8718:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_select_reuseport, struct sk_reuseport_kern *, reuse_kern,
    ^
   net/core/filter.c: At top level:
   net/core/filter.c:8719:12: warning: 'struct sk_reuseport_kern' declared inside parameter list
        struct bpf_map *, map, void *, key, u32, flags)
               ^
   include/linux/filter.h:460:31: note: in definition of macro '__BPF_DECL_ARGS'
    #define __BPF_DECL_ARGS(t, a) t   a
                                  ^
>> include/linux/filter.h:439:47: note: in expansion of macro '__BPF_MAP_3'
    #define __BPF_MAP_4(m, v, t, a, ...) m(t, a), __BPF_MAP_3(m, v, __VA_ARGS__)
                                                  ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_4'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:477:17: note: in expansion of macro '__BPF_MAP'
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__))
                    ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8718:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_select_reuseport, struct sk_reuseport_kern *, reuse_kern,
    ^
   include/linux/filter.h:477:6: error: conflicting types for '____sk_select_reuseport'
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__))
         ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8718:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_select_reuseport, struct sk_reuseport_kern *, reuse_kern,
    ^
   include/linux/filter.h:469:6: note: previous declaration of '____sk_select_reuseport' was here
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__));   \
         ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8718:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_select_reuseport, struct sk_reuseport_kern *, reuse_kern,
    ^
   In file included from include/linux/export.h:42:0,
                    from include/linux/linkage.h:7,
                    from include/linux/kernel.h:8,
                    from include/linux/list.h:9,
                    from include/linux/module.h:9,
                    from net/core/filter.c:20:
   net/core/filter.c: In function '____sk_select_reuseport':
   net/core/filter.c:8736:48: error: dereferencing pointer to incomplete type
     if (unlikely(reuse->reuseport_id != reuse_kern->reuseport_id)) {
                                                   ^
   include/linux/compiler.h:33:34: note: in definition of macro '__branch_check__'
       ______r = __builtin_expect(!!(x), expect); \
                                     ^
   net/core/filter.c:8736:6: note: in expansion of macro 'unlikely'
     if (unlikely(reuse->reuseport_id != reuse_kern->reuseport_id)) {
         ^
   net/core/filter.c:8736:48: error: dereferencing pointer to incomplete type
     if (unlikely(reuse->reuseport_id != reuse_kern->reuseport_id)) {
                                                   ^
   include/linux/compiler.h:35:19: note: in definition of macro '__branch_check__'
              expect, is_constant); \
                      ^
   net/core/filter.c:8736:6: note: in expansion of macro 'unlikely'
     if (unlikely(reuse->reuseport_id != reuse_kern->reuseport_id)) {
         ^
   net/core/filter.c:8739:27: error: dereferencing pointer to incomplete type
      if (unlikely(!reuse_kern->reuseport_id))
                              ^
   include/linux/compiler.h:33:34: note: in definition of macro '__branch_check__'
       ______r = __builtin_expect(!!(x), expect); \
                                     ^
   net/core/filter.c:8739:7: note: in expansion of macro 'unlikely'
      if (unlikely(!reuse_kern->reuseport_id))
          ^
   net/core/filter.c:8739:27: error: dereferencing pointer to incomplete type
      if (unlikely(!reuse_kern->reuseport_id))
                              ^
   include/linux/compiler.h:35:19: note: in definition of macro '__branch_check__'
              expect, is_constant); \
                      ^
   net/core/filter.c:8739:7: note: in expansion of macro 'unlikely'
      if (unlikely(!reuse_kern->reuseport_id))
          ^
   net/core/filter.c:8748:18: error: dereferencing pointer to incomplete type
      sk = reuse_kern->sk;
                     ^
   net/core/filter.c:8758:12: error: dereferencing pointer to incomplete type
     reuse_kern->selected_sk = selected_sk;
               ^
   In file included from include/net/sock.h:59:0,
                    from include/linux/sock_diag.h:8,
                    from net/core/filter.c:25:
   net/core/filter.c: At top level:
   net/core/filter.c:8774:18: warning: 'struct sk_reuseport_kern' declared inside parameter list
        const struct sk_reuseport_kern *, reuse_kern, u32, offset,
                     ^
   include/linux/filter.h:460:31: note: in definition of macro '__BPF_DECL_ARGS'
    #define __BPF_DECL_ARGS(t, a) t   a
                                  ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_4'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:469:17: note: in expansion of macro '__BPF_MAP'
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__));   \
                    ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8773:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_reuseport_load_bytes,
    ^
   net/core/filter.c:8774:18: warning: 'struct sk_reuseport_kern' declared inside parameter list
        const struct sk_reuseport_kern *, reuse_kern, u32, offset,
                     ^
   include/linux/filter.h:460:31: note: in definition of macro '__BPF_DECL_ARGS'
    #define __BPF_DECL_ARGS(t, a) t   a
                                  ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_4'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:470:28: note: in expansion of macro '__BPF_MAP'
     typedef u64 (*btf_##name)(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__)); \
                               ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8773:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_reuseport_load_bytes,
    ^
   net/core/filter.c: In function 'sk_reuseport_load_bytes':
>> include/linux/filter.h:453:2: warning: passing argument 1 of '(u64 (*)(const struct sk_reuseport_kern *, u32,  void *, u32))&____sk_reuseport_load_bytes' from incompatible pointer type
     (__force t)              \
     ^
   include/linux/filter.h:439:38: note: in expansion of macro '__BPF_CAST'
    #define __BPF_MAP_4(m, v, t, a, ...) m(t, a), __BPF_MAP_3(m, v, __VA_ARGS__)
                                         ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_4'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:474:35: note: in expansion of macro '__BPF_MAP'
      return ((btf_##name)____##name)(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
                                      ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8773:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_reuseport_load_bytes,
    ^
   include/linux/filter.h:453:2: note: expected 'const struct sk_reuseport_kern *' but argument is of type 'const struct sk_reuseport_kern *'
     (__force t)              \
     ^
   include/linux/filter.h:439:38: note: in expansion of macro '__BPF_CAST'
    #define __BPF_MAP_4(m, v, t, a, ...) m(t, a), __BPF_MAP_3(m, v, __VA_ARGS__)
                                         ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_4'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:474:35: note: in expansion of macro '__BPF_MAP'
      return ((btf_##name)____##name)(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
                                      ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8773:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_reuseport_load_bytes,
    ^
   include/linux/filter.h:474:10: warning: function called through a non-compatible type
      return ((btf_##name)____##name)(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
             ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8773:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_reuseport_load_bytes,
    ^
   net/core/filter.c: At top level:
   net/core/filter.c:8774:18: warning: 'struct sk_reuseport_kern' declared inside parameter list
        const struct sk_reuseport_kern *, reuse_kern, u32, offset,
                     ^
   include/linux/filter.h:460:31: note: in definition of macro '__BPF_DECL_ARGS'
    #define __BPF_DECL_ARGS(t, a) t   a
                                  ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_4'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:477:17: note: in expansion of macro '__BPF_MAP'
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__))
                    ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8773:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_reuseport_load_bytes,
    ^
   include/linux/filter.h:477:6: error: conflicting types for '____sk_reuseport_load_bytes'
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__))
         ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8773:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_reuseport_load_bytes,
    ^
   include/linux/filter.h:469:6: note: previous declaration of '____sk_reuseport_load_bytes' was here
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__));   \
         ^
   include/linux/filter.h:483:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_4(name, ...) BPF_CALL_x(4, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8773:1: note: in expansion of macro 'BPF_CALL_4'
    BPF_CALL_4(sk_reuseport_load_bytes,
    ^
   net/core/filter.c: In function '____sk_reuseport_load_bytes':
   net/core/filter.c:8777:42: error: dereferencing pointer to incomplete type
     return ____bpf_skb_load_bytes(reuse_kern->skb, offset, to, len);
                                             ^
   In file included from include/net/sock.h:59:0,
                    from include/linux/sock_diag.h:8,
                    from net/core/filter.c:25:
   net/core/filter.c: At top level:
   net/core/filter.c:8791:18: warning: 'struct sk_reuseport_kern' declared inside parameter list
        const struct sk_reuseport_kern *, reuse_kern, u32, offset,
                     ^
   include/linux/filter.h:460:31: note: in definition of macro '__BPF_DECL_ARGS'
    #define __BPF_DECL_ARGS(t, a) t   a
                                  ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_5'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:469:17: note: in expansion of macro '__BPF_MAP'
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__));   \
                    ^
   include/linux/filter.h:484:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_5(name, ...) BPF_CALL_x(5, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8790:1: note: in expansion of macro 'BPF_CALL_5'
    BPF_CALL_5(sk_reuseport_load_bytes_relative,
    ^
   net/core/filter.c:8791:18: warning: 'struct sk_reuseport_kern' declared inside parameter list
        const struct sk_reuseport_kern *, reuse_kern, u32, offset,
                     ^
   include/linux/filter.h:460:31: note: in definition of macro '__BPF_DECL_ARGS'
    #define __BPF_DECL_ARGS(t, a) t   a
                                  ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_5'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:470:28: note: in expansion of macro '__BPF_MAP'
     typedef u64 (*btf_##name)(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__)); \
                               ^
   include/linux/filter.h:484:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_5(name, ...) BPF_CALL_x(5, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8790:1: note: in expansion of macro 'BPF_CALL_5'
    BPF_CALL_5(sk_reuseport_load_bytes_relative,
    ^
   net/core/filter.c: In function 'sk_reuseport_load_bytes_relative':
>> include/linux/filter.h:453:2: warning: passing argument 1 of '(u64 (*)(const struct sk_reuseport_kern *, u32,  void *, u32,  u32))&____sk_reuseport_load_bytes_relative' from incompatible pointer type
     (__force t)              \
     ^
   include/linux/filter.h:440:38: note: in expansion of macro '__BPF_CAST'
    #define __BPF_MAP_5(m, v, t, a, ...) m(t, a), __BPF_MAP_4(m, v, __VA_ARGS__)
                                         ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_5'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:474:35: note: in expansion of macro '__BPF_MAP'
      return ((btf_##name)____##name)(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
                                      ^
   include/linux/filter.h:484:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_5(name, ...) BPF_CALL_x(5, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8790:1: note: in expansion of macro 'BPF_CALL_5'
    BPF_CALL_5(sk_reuseport_load_bytes_relative,
    ^
   include/linux/filter.h:453:2: note: expected 'const struct sk_reuseport_kern *' but argument is of type 'const struct sk_reuseport_kern *'
     (__force t)              \
     ^
   include/linux/filter.h:440:38: note: in expansion of macro '__BPF_CAST'
    #define __BPF_MAP_5(m, v, t, a, ...) m(t, a), __BPF_MAP_4(m, v, __VA_ARGS__)
                                         ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_5'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:474:35: note: in expansion of macro '__BPF_MAP'
      return ((btf_##name)____##name)(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
                                      ^
   include/linux/filter.h:484:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_5(name, ...) BPF_CALL_x(5, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8790:1: note: in expansion of macro 'BPF_CALL_5'
    BPF_CALL_5(sk_reuseport_load_bytes_relative,
    ^
   include/linux/filter.h:474:10: warning: function called through a non-compatible type
      return ((btf_##name)____##name)(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
             ^
   include/linux/filter.h:484:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_5(name, ...) BPF_CALL_x(5, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8790:1: note: in expansion of macro 'BPF_CALL_5'
    BPF_CALL_5(sk_reuseport_load_bytes_relative,
    ^
   net/core/filter.c: At top level:
   net/core/filter.c:8791:18: warning: 'struct sk_reuseport_kern' declared inside parameter list
        const struct sk_reuseport_kern *, reuse_kern, u32, offset,
                     ^
   include/linux/filter.h:460:31: note: in definition of macro '__BPF_DECL_ARGS'
    #define __BPF_DECL_ARGS(t, a) t   a
                                  ^
   include/linux/filter.h:449:27: note: in expansion of macro '__BPF_MAP_5'
    #define __BPF_MAP(n, ...) __BPF_MAP_##n(__VA_ARGS__)
                              ^
   include/linux/filter.h:477:17: note: in expansion of macro '__BPF_MAP'
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__))
                    ^
   include/linux/filter.h:484:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_5(name, ...) BPF_CALL_x(5, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8790:1: note: in expansion of macro 'BPF_CALL_5'
    BPF_CALL_5(sk_reuseport_load_bytes_relative,
    ^
   include/linux/filter.h:477:6: error: conflicting types for '____sk_reuseport_load_bytes_relative'
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__))
         ^
   include/linux/filter.h:484:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_5(name, ...) BPF_CALL_x(5, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8790:1: note: in expansion of macro 'BPF_CALL_5'
    BPF_CALL_5(sk_reuseport_load_bytes_relative,
    ^
   include/linux/filter.h:469:6: note: previous declaration of '____sk_reuseport_load_bytes_relative' was here
     u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__));   \
         ^
   include/linux/filter.h:484:31: note: in expansion of macro 'BPF_CALL_x'
    #define BPF_CALL_5(name, ...) BPF_CALL_x(5, name, __VA_ARGS__)
                                  ^
   net/core/filter.c:8790:1: note: in expansion of macro 'BPF_CALL_5'
    BPF_CALL_5(sk_reuseport_load_bytes_relative,
    ^
   net/core/filter.c: In function '____sk_reuseport_load_bytes_relative':
   net/core/filter.c:8794:51: error: dereferencing pointer to incomplete type
     return ____bpf_skb_load_bytes_relative(reuse_kern->skb, offset, to,
                                                      ^
   In file included from include/uapi/linux/bpf.h:12:0,
                    from include/linux/bpf.h:7,
                    from include/linux/bpf-cgroup.h:5,
                    from include/linux/cgroup-defs.h:22,
                    from include/linux/cgroup.h:28,
                    from include/net/netprio_cgroup.h:11,
                    from include/linux/netdevice.h:42,
                    from include/net/sock.h:46,
                    from include/linux/sock_diag.h:8,
                    from net/core/filter.c:25:
   net/core/filter.c: In function 'sk_reuseport_convert_ctx_access':
   include/linux/kernel.h:89:43: error: dereferencing pointer to incomplete type
    #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
                                              ^
   include/uapi/linux/bpf_common.h:17:27: note: in definition of macro 'BPF_SIZE'
..

vim +8693 net/core/filter.c

2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8686  
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8687  #ifdef CONFIG_INET
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8688  static void bpf_init_reuseport_kern(struct sk_reuseport_kern *reuse_kern,
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8689  				    struct sock_reuseport *reuse,
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8690  				    struct sock *sk, struct sk_buff *skb,
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08 @8691  				    u32 hash)
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8692  {
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08 @8693  	reuse_kern->skb = skb;
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8694  	reuse_kern->sk = sk;
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8695  	reuse_kern->selected_sk = NULL;
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8696  	reuse_kern->data_end = skb->data + skb_headlen(skb);
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8697  	reuse_kern->hash = hash;
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8698  	reuse_kern->reuseport_id = reuse->reuseport_id;
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8699  	reuse_kern->bind_inany = reuse->bind_inany;
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8700  }
2dbb9b9e6df67d Martin KaFai Lau 2018-08-08  8701  

:::::: The code at line 8693 was first introduced by commit
:::::: 2dbb9b9e6df67d444fbe425c7f6014858d337adf bpf: Introduce BPF_PROG_TYPE_SK_REUSEPORT

:::::: TO: Martin KaFai Lau <kafai@fb.com>
:::::: CC: Daniel Borkmann <daniel@iogearbox.net>

---
0-DAY kernel test infrastructure                 Open Source Technology Center
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