Hi Tony, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162] url: https://github.com/0day-ci/linux/commits/Tony-Asleson/Add-persistent-durable-identifier-to-storage-log-messages/20200725-011936 base: 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 config: x86_64-randconfig-a005-20200724 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1d09ecf36175f7910ffedd6d497c07b5c74c22fb) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/ata/libata-scsi.c:1094:5: warning: no previous prototype for function 'ata_scsi_durable_name' [-Wmissing-prototypes] int ata_scsi_durable_name(const struct device *dev, char *buf, size_t len) ^ drivers/ata/libata-scsi.c:1094:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int ata_scsi_durable_name(const struct device *dev, char *buf, size_t len) ^ static 1 warning generated. vim +/ata_scsi_durable_name +1094 drivers/ata/libata-scsi.c 1093 > 1094 int ata_scsi_durable_name(const struct device *dev, char *buf, size_t len) 1095 { 1096 struct ata_device *ata_dev = container_of(dev, struct ata_device, tdev); 1097 1098 return scsi_durable_name(ata_dev->sdev, buf, len); 1099 } 1100 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org