Hi Frank, First bad commit (maybe != root cause): tree: https://github.com/frank-w/BPI-R2-4.14 5.17-r2pro-hdmiv5 head: 2fc65b46be5ea69f66ce812f2c847c074a0eb1b6 commit: 741a809b69a5fc22105ce47dc43839fba1d33cf0 [16/97] mt6625l: fix makefiles to filter without quotes config: arm-randconfig-r012-20220210 (https://download.01.org/0day-ci/archive/20220210/202202100645.QhVIE58S-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project e8bff9ae54a55b4dbfeb6ba55f723abbd81bf494) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/frank-w/BPI-R2-4.14/commit/741a809b69a5fc22105ce47dc43... git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14 git fetch --no-tags frank-w-bpi-r2-4.14 5.17-r2pro-hdmiv5 git checkout 741a809b69a5fc22105ce47dc43839fba1d33cf0 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): static UINT8 WMT_EFUSE_EVT[] = { 0x02, 0x0D, 0x08, 0x00, ^ static UINT8 WMT_SET_REG_WR_EVT[] = { 0x02, 0x08, 0x04, 0x00 /*length */ ^ static UINT8 WMT_SET_REG_RD_EVT[] = { 0x02, 0x08, 0x04, 0x00 /*length */ ^ 3 errors generated. -- static UINT8 WMT_GET_SOC_ADIE_CHIPID_EVT[] = { ^ static UINT8 WMT_GET_SOC_6625_L_EVT[] = { ^ 2 errors generated. -- int mtk_wcn_cmb_stub_do_reset(unsigned int type) ^ drivers/misc/mediatek/connectivity/common/conn_soc/core/mtk_wcn_stub_alps.c:440:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int mtk_wcn_cmb_stub_do_reset(unsigned int type) ^ static irqreturn_t mtk_wcn_cmb_sdio_eirq_handler_stub(int irq, void *data) ^ drivers/misc/mediatek/connectivity/common/conn_soc/core/mtk_wcn_stub_alps.c:475:1: note: declare 'static' if the function is not intended to be used outside of this translation unit irqreturn_t mtk_wcn_cmb_sdio_eirq_handler_stub(int irq, void *data) ^ static 2 errors generated. -- INT32 _osal_fifo_init(OSAL_FIFO *pFifo, UINT8 *buf, UINT32 size) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pub/osal.c:628:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _osal_fifo_init(OSAL_FIFO *pFifo, UINT8 *buf, UINT32 size) ^ static INT32 _osal_fifo_deinit(OSAL_FIFO *pFifo) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pub/osal.c:661:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _osal_fifo_deinit(OSAL_FIFO *pFifo) ^ static INT32 _osal_fifo_size(OSAL_FIFO *pFifo) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pub/osal.c:678:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _osal_fifo_size(OSAL_FIFO *pFifo) ^ static INT32 _osal_fifo_avail_size(OSAL_FIFO *pFifo) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pub/osal.c:697:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _osal_fifo_avail_size(OSAL_FIFO *pFifo) ^ static INT32 _osal_fifo_len(OSAL_FIFO *pFifo) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pub/osal.c:716:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _osal_fifo_len(OSAL_FIFO *pFifo) ^ static INT32 _osal_fifo_is_empty(OSAL_FIFO *pFifo) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pub/osal.c:734:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _osal_fifo_is_empty(OSAL_FIFO *pFifo) ^ static INT32 _osal_fifo_is_full(OSAL_FIFO *pFifo) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pub/osal.c:752:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _osal_fifo_is_full(OSAL_FIFO *pFifo) ^ static INT32 _osal_fifo_data_in(OSAL_FIFO *pFifo, const VOID *buf, UINT32 len) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pub/osal.c:770:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _osal_fifo_data_in(OSAL_FIFO *pFifo, const VOID *buf, UINT32 len) ^ static INT32 _osal_fifo_data_out(OSAL_FIFO *pFifo, void *buf, UINT32 len) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pub/osal.c:794:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _osal_fifo_data_out(OSAL_FIFO *pFifo, void *buf, UINT32 len) ^ static INT32 _osal_fifo_reset(OSAL_FIFO *pFifo) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pub/osal.c:818:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _osal_fifo_reset(OSAL_FIFO *pFifo) ^ static 10 errors generated. -- int len; ^ 1 error generated. -- INT32 mtk_wcn_consys_stp_btif_rx(UINT8 *pBuf, UINT32 len) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_btif.c:191:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 mtk_wcn_consys_stp_btif_rx(UINT8 *pBuf, UINT32 len) ^ static 1 error generated. -- PUINT8 pbuf; ^ INT32 len; ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:474:8: error: variable 'len' set but not used [-Werror,-Wunused-but-set-variable] INT32 len; ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:473:9: error: variable 'pbuf' set but not used [-Werror,-Wunused-but-set-variable] PUINT8 pbuf; ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:500:9: error: variable 'pbuf' set but not used [-Werror,-Wunused-but-set-variable] PUINT8 pbuf; ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:501:8: error: variable 'len' set but not used [-Werror,-Wunused-but-set-variable] INT32 len; ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:519:9: error: variable 'pbuf' set but not used [-Werror,-Wunused-but-set-variable] PUINT8 pbuf; ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:520:8: error: variable 'len' set but not used [-Werror,-Wunused-but-set-variable] INT32 len; ^ int stp_gdb_notify_btm_dmp_wq(MTKSTP_DBG_T *stp_dbg) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:1032:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int stp_gdb_notify_btm_dmp_wq(MTKSTP_DBG_T *stp_dbg) ^ static int stp_dbg_dmp_in(MTKSTP_DBG_T *stp_dbg, char *buf, int len) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:1056:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int stp_dbg_dmp_in(MTKSTP_DBG_T *stp_dbg, char *buf, int len) ^ static char *mydata; ^ UINT8 *_stp_dbg_id_to_task(UINT32 id) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:1346:1: note: declare 'static' if the function is not intended to be used outside of this translation unit UINT8 *_stp_dbg_id_to_task(UINT32 id) ^ static INT32 _stp_dbg_parser_assert_str(PINT8 str, ENUM_ASSERT_INFO_PARSER_TYPE type) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:1362:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 _stp_dbg_parser_assert_str(PINT8 str, ENUM_ASSERT_INFO_PARSER_TYPE type) ^ static P_STP_DBG_CPUPCR_T stp_dbg_cpupcr_init(VOID) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:1530:1: note: declare 'static' if the function is not intended to be used outside of this translation unit P_STP_DBG_CPUPCR_T stp_dbg_cpupcr_init(VOID) ^ static P_STP_DBG_DMAREGS_T stp_dbg_dmaregs_init(VOID) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:1547:1: note: declare 'static' if the function is not intended to be used outside of this translation unit P_STP_DBG_DMAREGS_T stp_dbg_dmaregs_init(VOID) ^ static VOID stp_dbg_cpupcr_deinit(P_STP_DBG_CPUPCR_T pCpupcr) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:1564:1: note: declare 'static' if the function is not intended to be used outside of this translation unit VOID stp_dbg_cpupcr_deinit(P_STP_DBG_CPUPCR_T pCpupcr) ^ static VOID stp_dbg_dmaregs_deinit(P_STP_DBG_DMAREGS_T pDmaRegs) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/stp_dbg.c:1573:1: note: declare 'static' if the function is not intended to be used outside of this translation unit VOID stp_dbg_dmaregs_deinit(P_STP_DBG_DMAREGS_T pDmaRegs) ^ static 17 errors generated. -- INT32 wmt_dev_dbg_setup(VOID) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1289:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 wmt_dev_dbg_setup(VOID) ^ static INT32 wmt_dev_dbg_remove(VOID) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1303:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 wmt_dev_dbg_remove(VOID) ^ static INT32 wmt_dev_proc_for_aee_setup(VOID) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1374:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 wmt_dev_proc_for_aee_setup(VOID) ^ static INT32 wmt_dev_proc_for_aee_remove(VOID) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1390:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 wmt_dev_proc_for_aee_remove(VOID) ^ static INT32 wmt_dev_read_file(PUINT8 pName, const PPUINT8 ppBufPtr, INT32 offset, INT32 padSzBuf) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1435:1: note: declare 'static' if the function is not intended to be used outside of this translation unit INT32 wmt_dev_read_file(PUINT8 pName, const PPUINT8 ppBufPtr, INT32 offset, INT32 padSzBuf) ^ static MTK_WCN_BOOL wmt_dev_is_file_exist(PUINT8 pFileName) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1597:1: note: declare 'static' if the function is not intended to be used outside of this translation unit MTK_WCN_BOOL wmt_dev_is_file_exist(PUINT8 pFileName) ^ static extern INT32 wmt_dev_tra_bitf_update(void) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1645:8: note: declare 'static' if the function is not intended to be used outside of this translation unit extern INT32 wmt_dev_tra_bitf_update(void) ^ long wmt_dev_tm_temp_query(void) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1703:1: note: declare 'static' if the function is not intended to be used outside of this translation unit long wmt_dev_tm_temp_query(void) ^ static ssize_t WMT_write(struct file *filp, const char __user *buf, size_t count, loff_t *f_pos) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1801:1: note: declare 'static' if the function is not intended to be used outside of this translation unit ssize_t WMT_write(struct file *filp, const char __user *buf, size_t count, loff_t *f_pos) ^ static ssize_t WMT_read(struct file *filp, char __user *buf, size_t count, loff_t *f_pos) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1834:1: note: declare 'static' if the function is not intended to be used outside of this translation unit ssize_t WMT_read(struct file *filp, char __user *buf, size_t count, loff_t *f_pos) ^ static unsigned int WMT_poll(struct file *filp, poll_table *wait) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1865:1: note: declare 'static' if the function is not intended to be used outside of this translation unit unsigned int WMT_poll(struct file *filp, poll_table *wait) ^ static UINT32 u4Wait; ^ P_WMT_PATCH_INFO pTemp = NULL; ^ long WMT_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:1885:1: note: declare 'static' if the function is not intended to be used outside of this translation unit long WMT_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) ^ static void wmt_dev_bgw_desense_init(VOID) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:2368:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void wmt_dev_bgw_desense_init(VOID) ^ static void wmt_dev_bgw_desense_deinit(VOID) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:2373:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void wmt_dev_bgw_desense_deinit(VOID) ^ static int mtk_wcn_soc_common_drv_init(void) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:2544:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int mtk_wcn_soc_common_drv_init(void) ^ static void mtk_wcn_soc_common_drv_exit(void) ^ drivers/misc/mediatek/connectivity/common/conn_soc/linux/pri/wmt_dev.c:2550:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void mtk_wcn_soc_common_drv_exit(void) ^ static 18 errors generated. .. vim +/WMT_EFUSE_EVT +172 drivers/misc/mediatek/connectivity/common/conn_soc/core/wmt_core.c 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 171 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 @172 static UINT8 WMT_EFUSE_EVT[] = { 0x02, 0x0D, 0x08, 0x00, 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 173 0xAA, /*[4]operation, 0:init, 1:write 2:read */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 174 0xBB, /*[5]Number of register setting */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 175 0xCC, 0xCC, /*[6-7]Address */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 176 0xDD, 0xDD, 0xDD, 0xDD /*[8-11] Value */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 177 }; 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 178 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 179 static UINT8 WMT_DSNS_CMD[] = { 0x01, 0x0E, 0x02, 0x00, 0x01, 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 180 0x00 /*desnse type */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 181 }; 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 182 static UINT8 WMT_DSNS_EVT[] = { 0x02, 0x0E, 0x01, 0x00, 0x00 }; 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 183 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 184 /* TODO:[NewFeature][GeorgeKuo] Update register group in ONE CMD/EVT */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 185 static UINT8 WMT_SET_REG_CMD[] = { 0x01, 0x08, 0x10, 0x00 /*length */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 186 , 0x00 /*op: w(1) & r(2) */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 187 , 0x01 /*type: reg */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 188 , 0x00 /*res */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 189 , 0x01 /*1 register */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 190 , 0x00, 0x00, 0x00, 0x00 /* addr */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 191 , 0x00, 0x00, 0x00, 0x00 /* value */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 192 , 0xFF, 0xFF, 0xFF, 0xFF /*mask */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 193 }; 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 194 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 @195 static UINT8 WMT_SET_REG_WR_EVT[] = { 0x02, 0x08, 0x04, 0x00 /*length */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 196 , 0x00 /*S: 0 */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 197 , 0x00 /*type: reg */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 198 , 0x00 /*rev */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 199 , 0x01 /*1 register */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 200 /* , 0x00, 0x00, 0x00, 0x00 */ /* addr */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 201 /* , 0x00, 0x00, 0x00, 0x00 */ /* value */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 202 }; 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 203 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 @204 static UINT8 WMT_SET_REG_RD_EVT[] = { 0x02, 0x08, 0x04, 0x00 /*length */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 205 , 0x00 /*S: 0 */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 206 , 0x00 /*type: reg */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 207 , 0x00 /*rev */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 208 , 0x01 /*1 register */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 209 , 0x00, 0x00, 0x00, 0x00 /* addr */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 210 , 0x00, 0x00, 0x00, 0x00 /* value */ 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 211 }; 40b7b77e58eeb92 Frank Wunderlich 2022-01-30 212 :::::: The code at line 172 was first introduced by commit :::::: 40b7b77e58eeb92ede9e7842153047eb5d4e8942 mt6625l: add driver folder from 5.16 :::::: TO: Frank Wunderlich <frank-w(a)public-files.de&gt; :::::: CC: Frank Wunderlich <frank-w(a)public-files.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org