Hi Fugang, FYI, the error/warning still remains. tree: https://github.com/Freescale/linux-fslc pr/299 head: 79b60a57071319539fefa7d1bdba7e1613b94eef commit: 688b67b2c7220b01521ffe560da7eee33042c7bd [9167/17408] MLK-23806-01 net: wireless: nxp: mxm_wifiex: add initial MxM wifi driver config: um-allmodconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/Freescale/linux-fslc/commit/688b67b2c7220b01521ffe560d... git remote add freescale-fslc https://github.com/Freescale/linux-fslc git fetch --no-tags freescale-fslc pr/299 git checkout 688b67b2c7220b01521ffe560da7eee33042c7bd # save the attached .config to linux build tree make W=1 ARCH=um 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 >>): cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /mlan: No such file or directory [-Wmissing-include-dirs] In file included from drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan.h:39, from drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c:30: drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_ioctl.h:1946:1: note: offset of packed bit-field 'MaxAMSDU' has changed in GCC 4.4 1946 | } MLAN_PACK_END ExtCap_t, *pExtCap_t; | ^ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c:66:1: warning: no previous prototype for 'wlan_show_dot11axmaccap' [-Wmissing-prototypes] 66 | wlan_show_dot11axmaccap(pmlan_adapter pmadapter, t_u32 cap) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c:82:1: warning: no previous prototype for 'wlan_check_ap_11ax_twt_supported' [-Wmissing-prototypes] 82 | wlan_check_ap_11ax_twt_supported(BSSDescriptor_t *pbss_desc) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c: In function 'wlan_check_11ax_twt_supported': 122 | if (phecap->he_mac_cap[0] & HE_MAC_CAP_TWT_REQ_SUPPORT) ; | ^ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c: At top level: drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c:136:1: warning: no previous prototype for 'wlan_show_dot11axphycap' [-Wmissing-prototypes] 136 | wlan_show_dot11axphycap(pmlan_adapter pmadapter, t_u32 support) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c: In function 'wlan_ret_11ax_cmd': drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c:719:8: warning: variable 'tlv_type' set but not used [-Wunused-but-set-variable] 719 | t_u16 tlv_type = 0, tlv_len = 0; | ^~~~~~~~ -- cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] In file included from drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan.h:39, from drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c:30: drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_ioctl.h:1946:1: note: offset of packed bit-field 'MaxAMSDU' has changed in GCC 4.4 1946 | } MLAN_PACK_END ExtCap_t, *pExtCap_t; | ^ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c:66:1: warning: no previous prototype for 'wlan_show_dot11axmaccap' [-Wmissing-prototypes] 66 | wlan_show_dot11axmaccap(pmlan_adapter pmadapter, t_u32 cap) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c:82:1: warning: no previous prototype for 'wlan_check_ap_11ax_twt_supported' [-Wmissing-prototypes] 82 | wlan_check_ap_11ax_twt_supported(BSSDescriptor_t *pbss_desc) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c: In function 'wlan_check_11ax_twt_supported': 122 | if (phecap->he_mac_cap[0] & HE_MAC_CAP_TWT_REQ_SUPPORT) ; | ^ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c: At top level: drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c:136:1: warning: no previous prototype for 'wlan_show_dot11axphycap' [-Wmissing-prototypes] 136 | wlan_show_dot11axphycap(pmlan_adapter pmadapter, t_u32 support) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c: In function 'wlan_ret_11ax_cmd': drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c:719:8: warning: variable 'tlv_type' set but not used [-Wunused-but-set-variable] 719 | t_u16 tlv_type = 0, tlv_len = 0; | ^~~~~~~~ vim +/if +122 drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlan/mlan_11ax.c 94 95 /** 96 * @brief This function check if we should enable TWT support 97 * 98 * @param pbss_desc A pointer to BSSDescriptor_t structure 99 * 100 * @return MTRUE/MFALSE 101 */ 102 t_u8 103 wlan_check_11ax_twt_supported(mlan_private *pmpriv, BSSDescriptor_t *pbss_desc) 104 { 105 MrvlIEtypes_He_cap_t *phecap = MNULL; 106 MrvlIEtypes_He_cap_t *hw_he_cap = MNULL; 107 108 if (!wlan_check_ap_11ax_twt_supported(pbss_desc)) 109 return MFALSE; 110 if (pbss_desc->bss_band & BAND_A) { 111 hw_he_cap = 112 (MrvlIEtypes_He_cap_t *) & pmpriv->adapter->hw_he_cap; 113 phecap = (MrvlIEtypes_He_cap_t *) & pmpriv->user_he_cap; 114 } else { 115 hw_he_cap = 116 (MrvlIEtypes_He_cap_t *) & pmpriv->adapter-> 117 hw_2g_he_cap; 118 phecap = (MrvlIEtypes_He_cap_t *) & pmpriv->user_2g_he_cap; 119 } 120 if (!(hw_he_cap->he_mac_cap[0] & HE_MAC_CAP_TWT_REQ_SUPPORT)) 121 return MFALSE; 123 return MTRUE; 124 return MFALSE; 125 } 126 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org