tree: git://git.linaro.org/people/ulf.hansson/linux-pm.git cpuidle_psci_to_driver+genpd_onoff_notify head: e5f65ec625134fe268aa703e5b34d436eab4e0a0 commit: e5f65ec625134fe268aa703e5b34d436eab4e0a0 [7/7] PM / Domains: Add support for genpd on/off notifiers for specific devices config: nios2-randconfig-r002-20200617 (attached as .config) compiler: nios2-linux-gcc (GCC) 9.3.0 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 git checkout e5f65ec625134fe268aa703e5b34d436eab4e0a0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nios2 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 >>, old ones prefixed by <<): In file included from drivers/tty/serdev/core.c:16: 265 | { | ^ drivers/tty/serdev/core.c: In function 'serdev_controller_remove': drivers/tty/serdev/core.c:791:6: warning: variable 'dummy' set but not used [-Wunused-but-set-variable] 791 | int dummy; | ^~~~~ In file included from drivers/tty/serdev/core.c:16: drivers/tty/serdev/core.c: At top level: include/linux/pm_domain.h:263:19: warning: 'dev_pm_genpd_add_notifier' declared 'static' but never defined [-Wunused-function] 263 | static inline int dev_pm_genpd_add_notifier(struct device *dev, | ^~~~~~~~~~~~~~~~~~~~~~~~~ vim +265 include/linux/pm_domain.h 262 263 static inline int dev_pm_genpd_add_notifier(struct device *dev, 264 struct notifier_block *nb); 266 return -ENOTSUPP; 267 } 268 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org