[linux-next:master 6608/11041] tools/testing/selftests/hid/tools/include/vmlinux.h:42868:3: error: declaration does not declare anything

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   d724c6f85e80a23ed46b7ebc6e38b527c09d64f5
commit: a657bc8a75cf40c3d0814fe6488ba4af56528f42 [6608/11041] nstree: switch to new structures
config: x86_64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20251122/202511222209.CmfOK2uR-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251122/202511222209.CmfOK2uR-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202511222209.CmfOK2uR-lkp@intel.com/

Note: the linux-next/master HEAD d724c6f85e80a23ed46b7ebc6e38b527c09d64f5 builds fine.
      It may have been fixed somewhere.

All errors (new ones prefixed by >>):

   In file included from progs/hid.c:3:
   In file included from progs/hid_bpf_helpers.h:28:
>> tools/testing/selftests/hid/tools/include/vmlinux.h:42868:3: error: declaration does not declare anything [-Werror,-Wmissing-declarations]
    42868 |                 struct ns_tree;
          |                 ^~~~~~~~~~~~~~
   progs/hid.c:503:24: error: incomplete definition of type 'struct hid_device'
     503 |         int hid = hid_ctx->hid->id;
         |                   ~~~~~~~~~~~~^
   progs/hid_bpf_helpers.h:59:9: note: forward declaration of 'struct hid_device'
      59 |         struct hid_device *hid;
         |                ^
   2 errors generated.

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