[kbuild-all] drivers/usb/gadget/udc/bcm63xx_udc.c:2251:46: error: use of undeclared identifier 'usb_debug_root'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 4333a9b0b67bb4e8bcd91bdd80da80b0ec151162 commit: a66ada4f241c9a5a0bbabc5af511ea5dd4c2cbb8 usb: gadget: bcm63xx_udc: create debugfs directory under usb root date: 7 months ago config: mips-randconfig-r015-20200621 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project f5bbe390d23d7da0ffb110cdb24b583c2dc87eba) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu git checkout a66ada4f241c9a5a0bbabc5af511ea5dd4c2cbb8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 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 >>): root = debugfs_create_dir(udc->gadget.name, usb_debug_root); ^ 1 error generated. vim +/usb_debug_root +2251 drivers/usb/gadget/udc/bcm63xx_udc.c 2239 2240 /** 2241 * bcm63xx_udc_init_debugfs - Create debugfs entries. 2242 * @udc: Reference to the device controller. 2243 */ 2244 static void bcm63xx_udc_init_debugfs(struct bcm63xx_udc *udc) 2245 { 2246 struct dentry *root; 2247 2248 if (!IS_ENABLED(CONFIG_USB_GADGET_DEBUG_FS)) 2249 return; 2250 2252 udc->debugfs_root = root; 2253 2254 debugfs_create_file("usbd", 0400, root, udc, &bcm63xx_usbd_dbg_fops); 2255 debugfs_create_file("iudma", 0400, root, udc, &bcm63xx_iudma_dbg_fops); 2256 } 2257 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org