tree: https://github.com/ammarfaizi2/linux-block kvalo/ath/pending head: 8415824bf3ea5c313f15b902497cd2834c01e78e commit: f38b44f68cd13a37d90c62863250c16b951e202e [283/294] ath11k: Add register access logic for WCN6750 config: arm64-randconfig-r011-20220116 (https://download.01.org/0day-ci/archive/20220118/202201180419.pxOIAhwJ-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5f782d25a742302d25ef3c8b84b54f7483c2deb9) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/ammarfaizi2/linux-block/commit/f38b44f68cd13a37d90c628... git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block kvalo/ath/pending git checkout f38b44f68cd13a37d90c62863250c16b951e202e # 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=arm64 SHELL=/bin/bash drivers/net/wireless/ath/ath11k/ 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 >>): } else if (ab->bus_params.ops.window_read32) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:56:28: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:30: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/ath/ath11k/pci_cmn.c:195:9: note: uninitialized use occurs here return val; ^~~ drivers/net/wireless/ath/ath11k/pci_cmn.c:185:10: note: remove the 'if' if its condition is always true } else if (ab->bus_params.ops.window_read32) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:56:23: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ drivers/net/wireless/ath/ath11k/pci_cmn.c:168:9: note: initialize the variable 'val' to silence this warning u32 val, window_start; ^ = 0 1 warning generated. vim +185 drivers/net/wireless/ath/ath11k/pci_cmn.c 165 166 u32 ath11k_pci_read32(struct ath11k_base *ab, u32 offset) 167 { 168 u32 val, window_start; 169 170 /* for offset beyond BAR + 4K - 32, may 171 * need to wakeup the device to access. 172 */ 173 if (test_bit(ATH11K_FLAG_DEVICE_INIT_DONE, &ab->dev_flags) && 174 offset >= ATH11K_PCI_ACCESS_ALWAYS_OFF && 175 ab->bus_params.ops.wakeup) 176 ab->bus_params.ops.wakeup(ab); 177 178 if (offset < ATH11K_PCI_WINDOW_START) { 179 val = ioread32(ab->mem + offset); 180 } else { 181 if (ab->bus_params.static_window_map) { 182 window_start = ath11k_pci_get_window_start(ab, offset); 183 val = ioread32(ab->mem + window_start + 184 (offset & ATH11K_PCI_WINDOW_RANGE_MASK)); 186 val = ab->bus_params.ops.window_read32(ab, offset); 187 } 188 } 189 190 if (test_bit(ATH11K_FLAG_DEVICE_INIT_DONE, &ab->dev_flags) && 191 offset >= ATH11K_PCI_ACCESS_ALWAYS_OFF && 192 ab->bus_params.ops.release) 193 ab->bus_params.ops.release(ab); 194 195 return val; 196 } 197 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org