tree:   https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git pending
head:   a9cccebc0c3b91c2e5d2033d11def1e6f7fc74d4
commit: d1f965c7b4068af9420408f308bcc6206158b658 [16/26] wcn36xx: Run suspend for the first ieee80211_vif
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?id=d1f965c7b4068af9420408f308bcc6206158b658
        git remote add ath6kl https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git
        git fetch --no-tags ath6kl pending
        git checkout d1f965c7b4068af9420408f308bcc6206158b658
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 

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

All warnings (new ones prefixed by >>):

>> drivers/net/wireless/ath/wcn36xx/main.c:1091:23: warning: no previous prototype for 'wcn36xx_get_first_vif' [-Wmissing-prototypes]
    1091 | struct ieee80211_vif *wcn36xx_get_first_vif(struct wcn36xx *wcn)
         |                       ^~~~~~~~~~~~~~~~~~~~~


vim +/wcn36xx_get_first_vif +1091 drivers/net/wireless/ath/wcn36xx/main.c

  1090	
> 1091	struct ieee80211_vif *wcn36xx_get_first_vif(struct wcn36xx *wcn)
  1092	{
  1093		struct wcn36xx_vif *tmp;
  1094		struct ieee80211_vif *vif = NULL;
  1095	
  1096		list_for_each_entry(tmp, &wcn->vif_list, list) {
  1097			vif = wcn36xx_priv_to_vif(tmp);
  1098			if (vif)
  1099				break;
  1100		}
  1101		return vif;
  1102	}
  1103	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org