Hi Bryan, I love your patch! Perhaps something to improve: [auto build test WARNING on 160b351d75cb50a0dd2abf9b63e1891935aa9e4a] url: https://github.com/0day-ci/linux/commits/Bryan-O-Donoghue/wcn36xx-Tidy-up... base: 160b351d75cb50a0dd2abf9b63e1891935aa9e4a config: powerpc-randconfig-r011-20200909 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0a5dc7effb191eff740e0e7ae7bd8e1f6bdb3ad9) 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 # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/net/wireless/ath/wcn36xx/smd.c:150:1: warning: no previous prototype for function 'wcn36xx_smd_set_bss_vht_params' [-Wmissing-prototypes] wcn36xx_smd_set_bss_vht_params(struct ieee80211_vif *vif, ^ drivers/net/wireless/ath/wcn36xx/smd.c:149:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ^ static drivers/net/wireless/ath/wcn36xx/smd.c:186:6: warning: no previous prototype for function 'wcn36xx_smd_set_sta_vht_params' [-Wmissing-prototypes] void wcn36xx_smd_set_sta_vht_params(struct wcn36xx *wcn, ^ drivers/net/wireless/ath/wcn36xx/smd.c:186:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void wcn36xx_smd_set_sta_vht_params(struct wcn36xx *wcn, ^ static drivers/net/wireless/ath/wcn36xx/smd.c:208:6: warning: no previous prototype for function 'wcn36xx_smd_set_sta_ht_ldpc_params' [-Wmissing-prototypes] void wcn36xx_smd_set_sta_ht_ldpc_params(struct ieee80211_sta *sta, ^ drivers/net/wireless/ath/wcn36xx/smd.c:208:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void wcn36xx_smd_set_sta_ht_ldpc_params(struct ieee80211_sta *sta, ^ static drivers/net/wireless/ath/wcn36xx/smd.c:233:6: warning: no previous prototype for function 'wcn36xx_smd_set_sta_default_vht_params' [-Wmissing-prototypes] void wcn36xx_smd_set_sta_default_vht_params(struct wcn36xx *wcn, ^ drivers/net/wireless/ath/wcn36xx/smd.c:233:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void wcn36xx_smd_set_sta_default_vht_params(struct wcn36xx *wcn, ^ static drivers/net/wireless/ath/wcn36xx/smd.c:249:6: warning: no previous prototype for function 'wcn36xx_smd_set_sta_default_ht_ldpc_params' [-Wmissing-prototypes] void wcn36xx_smd_set_sta_default_ht_ldpc_params(struct wcn36xx *wcn, ^ drivers/net/wireless/ath/wcn36xx/smd.c:249:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void wcn36xx_smd_set_sta_default_ht_ldpc_params(struct wcn36xx *wcn, ^ static drivers/net/wireless/ath/wcn36xx/smd.c:1253:1: warning: no previous prototype for function 'wcn36xx_smd_set_sta_params_v1' [-Wmissing-prototypes] wcn36xx_smd_set_sta_params_v1(struct wcn36xx *wcn, ^ drivers/net/wireless/ath/wcn36xx/smd.c:1252:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ^ static drivers/net/wireless/ath/wcn36xx/smd.c:1387:6: warning: no previous prototype for function 'wcn36xx_smd_set_bss_params' [-Wmissing-prototypes] void wcn36xx_smd_set_bss_params(struct wcn36xx *wcn, ^ drivers/net/wireless/ath/wcn36xx/smd.c:1387:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void wcn36xx_smd_set_bss_params(struct wcn36xx *wcn, ^ static int wcn36xx_smd_config_bss_v0(struct wcn36xx *wcn, struct ieee80211_vif *vif, ^ drivers/net/wireless/ath/wcn36xx/smd.c:1587:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int wcn36xx_smd_config_bss_v0(struct wcn36xx *wcn, struct ieee80211_vif *vif, ^ static 8 warnings generated. # https://github.com/0day-ci/linux/commit/3c3f8bcaf7d541aab14db1b75513565da... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Bryan-O-Donoghue/wcn36xx-Tidy-up-BSS-STA-config/20200910-011120 git checkout 3c3f8bcaf7d541aab14db1b75513565dad07aa26 vim +/wcn36xx_smd_config_bss_v0 +1587 drivers/net/wireless/ath/wcn36xx/smd.c 1586 1588 struct ieee80211_sta *sta, const u8 *bssid, 1589 bool update) 1590 { 1591 struct wcn36xx_hal_config_bss_req_msg *msg; 1592 struct wcn36xx_hal_config_bss_params *bss; 1593 struct wcn36xx_hal_config_sta_params *sta_params; 1594 int ret; 1595 1596 msg = kzalloc(sizeof(*msg), GFP_KERNEL); 1597 if (!msg) 1598 return -ENOMEM; 1599 1600 INIT_HAL_MSG((*msg), WCN36XX_HAL_CONFIG_BSS_REQ); 1601 1602 bss = &msg->bss_params; 1603 sta_params = &bss->sta; 1604 1605 wcn36xx_smd_set_bss_params(wcn, vif, sta, bssid, update, bss); 1606 wcn36xx_smd_set_sta_params(wcn, vif, sta, sta_params); 1607 1608 PREPARE_HAL_BUF(wcn->hal_buf, (*msg)); 1609 1610 wcn36xx_dbg(WCN36XX_DBG_HAL, 1611 "hal config bss bssid %pM self_mac_addr %pM bss_type %d oper_mode %d nw_type %d\n", 1612 bss->bssid, bss->self_mac_addr, bss->bss_type, 1613 bss->oper_mode, bss->nw_type); 1614 1615 wcn36xx_dbg(WCN36XX_DBG_HAL, 1616 "- sta bssid %pM action %d sta_index %d bssid_index %d aid %d type %d mac %pM\n", 1617 sta_params->bssid, sta_params->action, 1618 sta_params->sta_index, sta_params->bssid_index, 1619 sta_params->aid, sta_params->type, 1620 sta_params->mac); 1621 1622 ret = wcn36xx_smd_send_and_wait(wcn, msg->header.len); 1623 kfree(msg); 1624 1625 return ret; 1626 } 1627 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org