Hi Andy, I love your patch! Yet something to improve: [auto build test ERROR on usb/usb-testing] [also build test ERROR on peter.chen-usb/ci-for-usb-next balbi-usb/testing/next linus/master v5.9-rc1 next-20200817] [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/Andy-Shevchenko/usb-early-xhci-d... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: x86_64-randconfig-r014-20200817 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project de71b46a519db014ce906a39f8a0e1b235ef1568) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): In file included from drivers/usb/early/xhci-dbc.c:12: include/linux/byteorder/generic.h:144:33: error: unknown type name '__le16' static inline void le16_add_cpu(__le16 *var, u16 val) ^ include/linux/byteorder/generic.h:144:46: error: unknown type name 'u16' static inline void le16_add_cpu(__le16 *var, u16 val) ^ *var = cpu_to_le16(le16_to_cpu(*var) + val); ^ include/linux/byteorder/generic.h:90:21: note: expanded from macro 'cpu_to_le16' #define cpu_to_le16 __cpu_to_le16 ^ *var = cpu_to_le16(le16_to_cpu(*var) + val); ^ include/linux/byteorder/generic.h:91:21: note: expanded from macro 'le16_to_cpu' #define le16_to_cpu __le16_to_cpu ^ include/linux/byteorder/generic.h:149:33: error: unknown type name '__le32' static inline void le32_add_cpu(__le32 *var, u32 val) ^ include/linux/byteorder/generic.h:149:46: error: unknown type name 'u32' static inline void le32_add_cpu(__le32 *var, u32 val) ^ *var = cpu_to_le32(le32_to_cpu(*var) + val); ^ include/linux/byteorder/generic.h:88:21: note: expanded from macro 'cpu_to_le32' #define cpu_to_le32 __cpu_to_le32 ^ *var = cpu_to_le32(le32_to_cpu(*var) + val); ^ include/linux/byteorder/generic.h:89:21: note: expanded from macro 'le32_to_cpu' #define le32_to_cpu __le32_to_cpu ^ include/linux/byteorder/generic.h:154:33: error: unknown type name '__le64' static inline void le64_add_cpu(__le64 *var, u64 val) ^ include/linux/byteorder/generic.h:154:46: error: unknown type name 'u64' static inline void le64_add_cpu(__le64 *var, u64 val) ^ *var = cpu_to_le64(le64_to_cpu(*var) + val); ^ include/linux/byteorder/generic.h:86:21: note: expanded from macro 'cpu_to_le64' #define cpu_to_le64 __cpu_to_le64 ^ *var = cpu_to_le64(le64_to_cpu(*var) + val); ^ include/linux/byteorder/generic.h:87:21: note: expanded from macro 'le64_to_cpu' #define le64_to_cpu __le64_to_cpu ^ include/linux/byteorder/generic.h:159:38: error: unknown type name '__le16' static inline void cpu_to_le16_array(__le16 *dst, const u16 *src, size_t len) ^ include/linux/byteorder/generic.h:159:57: error: unknown type name 'u16' static inline void cpu_to_le16_array(__le16 *dst, const u16 *src, size_t len) ^ include/linux/byteorder/generic.h:159:67: error: unknown type name 'size_t' static inline void cpu_to_le16_array(__le16 *dst, const u16 *src, size_t len) ^ include/linux/byteorder/generic.h:164:12: error: implicit declaration of function '__cpu_to_le16' [-Werror,-Wimplicit-function-declaration] dst[i] = cpu_to_le16(src[i]); ^ include/linux/byteorder/generic.h:90:21: note: expanded from macro 'cpu_to_le16' #define cpu_to_le16 __cpu_to_le16 ^ include/linux/byteorder/generic.h:167:38: error: unknown type name 'u16' static inline void le16_to_cpu_array(u16 *dst, const __le16 *src, size_t len) ^ include/linux/byteorder/generic.h:167:54: error: unknown type name '__le16' static inline void le16_to_cpu_array(u16 *dst, const __le16 *src, size_t len) ^ include/linux/byteorder/generic.h:167:67: error: unknown type name 'size_t' static inline void le16_to_cpu_array(u16 *dst, const __le16 *src, size_t len) ^ fatal error: too many errors emitted, stopping now [-ferror-limit=] 20 errors generated. # https://github.com/0day-ci/linux/commit/379f669600c31fef2fa3b729ebb9ecf70... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Andy-Shevchenko/usb-early-xhci-dbc-use-readl_poll_timeout-to-simplify-code/20200818-004710 git checkout 379f669600c31fef2fa3b729ebb9ecf706d69621 vim +/__cpu_to_le16 +146 include/linux/byteorder/generic.h ^1da177e4c3f415 Linus Torvalds 2005-04-16 143 8b5f6883683c91a Marcin Slusarz 2008-02-08 144 static inline void le16_add_cpu(__le16 *var, u16 val) 8b5f6883683c91a Marcin Slusarz 2008-02-08 145 { 8b5f6883683c91a Marcin Slusarz 2008-02-08 @146 *var = cpu_to_le16(le16_to_cpu(*var) + val); 8b5f6883683c91a Marcin Slusarz 2008-02-08 147 } 8b5f6883683c91a Marcin Slusarz 2008-02-08 148 8b5f6883683c91a Marcin Slusarz 2008-02-08 149 static inline void le32_add_cpu(__le32 *var, u32 val) 8b5f6883683c91a Marcin Slusarz 2008-02-08 150 { 8b5f6883683c91a Marcin Slusarz 2008-02-08 @151 *var = cpu_to_le32(le32_to_cpu(*var) + val); 8b5f6883683c91a Marcin Slusarz 2008-02-08 152 } 8b5f6883683c91a Marcin Slusarz 2008-02-08 153 8b5f6883683c91a Marcin Slusarz 2008-02-08 154 static inline void le64_add_cpu(__le64 *var, u64 val) 8b5f6883683c91a Marcin Slusarz 2008-02-08 155 { 8b5f6883683c91a Marcin Slusarz 2008-02-08 @156 *var = cpu_to_le64(le64_to_cpu(*var) + val); 8b5f6883683c91a Marcin Slusarz 2008-02-08 157 } 8b5f6883683c91a Marcin Slusarz 2008-02-08 158 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org