Hi Chunfeng, I love your patch! Perhaps something to improve: [auto build test WARNING on usb/usb-testing] [also build test WARNING on robh/for-next linus/master v5.12-rc4 next-20210323] [cannot apply to mediatek/for-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Chunfeng-Yun/dt-bindings-usb-mtk... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: alpha-allyesconfig (attached as .config) compiler: alpha-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/0day-ci/linux/commit/519248a4690ce1617790e13220fb52bad... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Chunfeng-Yun/dt-bindings-usb-mtk-xhci-support-property-usb2-lpm-disable/20210322-111651 git checkout 519248a4690ce1617790e13220fb52badd09b0c9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 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 include/linux/bits.h:6, from include/linux/bitops.h:6, from include/linux/kernel.h:11, from include/linux/clk.h:13, from drivers/usb/host/xhci-mtk.c:10: drivers/usb/host/xhci-mtk.c: In function 'usb_wakeup_ip_sleep_set': 7 | #define BIT(nr) (UL(1) << (nr)) | ^ drivers/usb/host/xhci-mtk.c:71:19: note: in expansion of macro 'BIT' 71 | #define WC0_IS_EN BIT(6) | ^~~ drivers/usb/host/xhci-mtk.c:313:9: note: in expansion of macro 'WC0_IS_EN' 313 | msk = WC0_IS_EN | WC0_IS_C(0xf) | WC0_IS_P; | ^~~~~~~~~ vim +7 include/vdso/bits.h 3945ff37d2f48d Vincenzo Frascino 2020-03-20 6 3945ff37d2f48d Vincenzo Frascino 2020-03-20 @7 #define BIT(nr) (UL(1) << (nr)) 3945ff37d2f48d Vincenzo Frascino 2020-03-20 8 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org