tree: https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel head: ccf63100a2114b19c81d53db1e7cc76de85d9839 commit: 8ee1d6933417ddd5cbd186b9186406a155d1b209 [77/101] make use of uart_get_byte_size config: powerpc-randconfig-r036-20210219 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git/commi... git remote add jirislaby https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git git fetch --no-tags jirislaby devel git checkout 8ee1d6933417ddd5cbd186b9186406a155d1b209 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 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 >>): newline.bDataBits = uart_get_byte_size(termios->c_cflag, false, false, ^ false) ^ ; 2 errors generated. -- urb_value = BELKIN_SA_DATA_BITS(uart_get_byte_size(cflag, ^ 1 error generated. -- data_bits = uart_get_byte_size(cflag, false, false, false) - 5; ^ 1 error generated. -- buf[6] = uart_get_byte_size(C_CSIZE(tty), false, false, false); ^ 1 error generated. -- port_settings.bits = uart_get_byte_size(cflag, false, false, false); ^ 1 error generated. vim +/uart_get_byte_size +1056 drivers/usb/class/cdc-acm.c 1042 1043 static void acm_tty_set_termios(struct tty_struct *tty, 1044 struct ktermios *termios_old) 1045 { 1046 struct acm *acm = tty->driver_data; 1047 struct ktermios *termios = &tty->termios; 1048 struct usb_cdc_line_coding newline; 1049 int newctrl = acm->ctrlout; 1050 1051 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1052 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1053 newline.bParityType = termios->c_cflag & PARENB ? 1054 (termios->c_cflag & PARODD ? 1 : 2) + 1055 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1058 1059 /* FIXME: Needs to clear unsupported bits in the termios */ 1060 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1061 1062 if (C_BAUD(tty) == B0) { 1063 newline.dwDTERate = acm->line.dwDTERate; 1064 newctrl &= ~ACM_CTRL_DTR; 1065 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1066 newctrl |= ACM_CTRL_DTR; 1067 } 1068 1069 if (newctrl != acm->ctrlout) 1070 acm_set_control(acm, acm->ctrlout = newctrl); 1071 1072 if (memcmp(&acm->line, &newline, sizeof newline)) { 1073 memcpy(&acm->line, &newline, sizeof newline); 1074 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1075 __func__, 1076 le32_to_cpu(newline.dwDTERate), 1077 newline.bCharFormat, newline.bParityType, 1078 newline.bDataBits); 1079 acm_set_line(acm, &acm->line); 1080 } 1081 } 1082 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org