tree: https://github.com/thierryreding/linux for-5.11/suspend head: 00480d8a4afba78936d3a3ca2c4272538affb838 commit: b8561a2e4c1332363e61ebf6f2b04a8aaee8cfeb [18/23] xhci: tegra: Enable ELPG for runtime/system PM config: arm64-randconfig-r015-20201113 (attached as .config) compiler: aarch64-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 # https://github.com/thierryreding/linux/commit/b8561a2e4c1332363e61ebf6f2b... git remote add thierryreding https://github.com/thierryreding/linux git fetch --no-tags thierryreding for-5.11/suspend git checkout b8561a2e4c1332363e61ebf6f2b04a8aaee8cfeb # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 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 >>): drivers/usb/host/xhci-tegra.c: In function 'tegra_xusb_runtime_suspend': 2179 | ret = tegra_xusb_enter_elpg(tegra, true); | ^~~~~~~~~~~~~~~~~~~~~ | tegra_pm_enter_lp2 drivers/usb/host/xhci-tegra.c: In function 'tegra_xusb_runtime_resume': 2191 | err = tegra_xusb_exit_elpg(tegra, true); | ^~~~~~~~~~~~~~~~~~~~ | tegra_xusb_get_phy At top level: drivers/usb/host/xhci-tegra.c:1285:13: warning: 'is_host_mode_phy' defined but not used [-Wunused-function] 1285 | static bool is_host_mode_phy(struct tegra_xusb *tegra, unsigned int phy_type, unsigned int index) | ^~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +2179 drivers/usb/host/xhci-tegra.c 2170 2171 #ifdef CONFIG_PM 2172 static int tegra_xusb_runtime_suspend(struct device *dev) 2173 { 2174 struct tegra_xusb *tegra = dev_get_drvdata(dev); 2175 int ret; 2176 2177 synchronize_irq(tegra->mbox_irq); 2178 mutex_lock(&tegra->lock); 2180 mutex_unlock(&tegra->lock); 2181 2182 return ret; 2183 } 2184 2185 static int tegra_xusb_runtime_resume(struct device *dev) 2186 { 2187 struct tegra_xusb *tegra = dev_get_drvdata(dev); 2188 int err; 2189 2190 mutex_lock(&tegra->lock); 2192 mutex_unlock(&tegra->lock); 2193 2194 return err; 2195 } 2196 #endif 2197 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org