tree: https://github.com/jimc/linux.git dd-drm-next head: 531b8210367c9d9d3430d37a12c01dced8e4354f commit: 36e19f73c31f9c5b9db4b2b4661c065a36ffc174 [2/12] dyndbg: add DEFINE_DYNAMIC_DEBUG_CATEGORIES and callbacks config: i386-randconfig-r033-20210821 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d9c5613e856cf2addfbf892fc4c1ce9ef9feceaa) 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 # https://github.com/jimc/linux/commit/36e19f73c31f9c5b9db4b2b4661c065a36ff... git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dd-drm-next git checkout 36e19f73c31f9c5b9db4b2b4661c065a36ffc174 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 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 >>): In file included from drivers/usb/typec/tipd/core.c:9: In file included from include/linux/i2c.h:13: In file included from include/linux/acpi.h:28: static inline int param_set_dyndbg(const char *instr, const struct kernel_param *kp) ^ include/linux/dynamic_debug.h:234:63: warning: declaration of 'struct kernel_param' will not be visible outside of this function [-Wvisibility] static inline int param_get_dyndbg(char *buffer, const struct kernel_param *kp) ^ drivers/usb/typec/tipd/core.c:166:19: warning: unused function 'tps6598x_write16' [-Wunused-function] static inline int tps6598x_write16(struct tps6598x *tps, u8 reg, u16 val) ^ drivers/usb/typec/tipd/core.c:171:19: warning: unused function 'tps6598x_write32' [-Wunused-function] static inline int tps6598x_write32(struct tps6598x *tps, u8 reg, u32 val) ^ 4 warnings generated. vim +232 include/linux/dynamic_debug.h 231 233 { return 0; } 234 static inline int param_get_dyndbg(char *buffer, const struct kernel_param *kp) 235 { return 0; } 236 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org