Hi Andy,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Andy-Roulin/net-bridge-add-stp_mode-attribute-for-STP-mode-selection/20260329-191152
base:   net-next/main
patch link:    https://lore.kernel.org/r/20260329025858.330620-2-aroulin%40nvidia.com
patch subject: [PATCH net-next v2 1/3] net: bridge: add stp_mode attribute for STP mode selection
config: s390-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260329/202603291905.TUiTIocs-lkp@intel.com/config)
compiler: s390x-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260329/202603291905.TUiTIocs-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 [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202603291905.TUiTIocs-lkp@intel.com/ (local)

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

   In file included from rt-link-user.c:9:

quoted

rt-link-user.h:38:42: warning: 'enum rt_link_br_stp_mode' declared inside parameter list will not be visible outside of this definition or declaration

      38 | const char *rt_link_br_stp_mode_str(enum rt_link_br_stp_mode value);
         |                                          ^~~~~~~~~~~~~~~~~~~

quoted

rt-link-user.h:245:34: error: field 'stp_mode' has incomplete type

     245 |         enum rt_link_br_stp_mode stp_mode;
         |                                  ^~~~~~~~

quoted

rt-link-user.h:2164:80: error: parameter 2 ('stp_mode') has incomplete type

    2164 |                                                       enum rt_link_br_stp_mode stp_mode)
         |                                                       ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
   rt-link-user.h:6234:85: error: parameter 2 ('stp_mode') has incomplete type
    6234 |                                                            enum rt_link_br_stp_mode stp_mode)
         |                                                            ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
   rt-link-user.h:10089:80: error: parameter 2 ('stp_mode') has incomplete type
   10089 |                                                       enum rt_link_br_stp_mode stp_mode)
         |                                                       ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~

quoted

rt-link-user.c:352:62: error: parameter 1 ('value') has incomplete type

     352 | const char *rt_link_br_stp_mode_str(enum rt_link_br_stp_mode value)
         |                                     ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
   rt-link-user.c: In function 'rt_link_br_stp_mode_str':

quoted

rt-link-user.c:357:1: warning: control reaches end of non-void function [-Wreturn-type]

     357 | }
         | ^

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