tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y head: e864f43593ccf9180c61738abdf1c1dde091367d commit: 1d815c5a94345509d89dbf4d6b5060dbc6758eaa [66/9999] sc16is7xx: missing unregister/delete driver on error in sc16is7xx_init() config: x86_64-randconfig-r015-20210209 (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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-4.19.y git checkout 1d815c5a94345509d89dbf4d6b5060dbc6758eaa # 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 warnings (new ones prefixed by >>): In file included from drivers/tty/serial/sc16is7xx.c:12: In file included from include/linux/clk.h:17: In file included from include/linux/notifier.h:15: In file included from include/linux/rwsem.h:16: In file included from include/linux/spinlock.h:51: In file included from include/linux/preempt.h:81: In file included from arch/x86/include/asm/preempt.h:7: In file included from include/linux/thread_info.h:38: In file included from arch/x86/include/asm/thread_info.h:53: arch/x86/include/asm/cpufeature.h:164:2: error: implicit declaration of function 'asm_volatile_goto' [-Werror,-Wimplicit-function-declaration] asm_volatile_goto("1: jmp 6f\n" ^ arch/x86/include/asm/cpufeature.h:195:4: error: expected ')' : : [feature] "i" (bit), ^ arch/x86/include/asm/cpufeature.h:164:19: note: to match this '(' asm_volatile_goto("1: jmp 6f\n" ^ err_i2c: ^~~~~~~~ 1 warning and 2 errors generated. vim +/err_i2c +1501 drivers/tty/serial/sc16is7xx.c 1487 1488 #ifdef CONFIG_SERIAL_SC16IS7XX_SPI 1489 ret = spi_register_driver(&sc16is7xx_spi_uart_driver); 1490 if (ret < 0) { 1491 pr_err("failed to init sc16is7xx spi --> %d\n", ret); 1492 goto err_spi; 1493 } 1494 #endif 1495 return ret; 1496 1497 err_spi: 1498 #ifdef CONFIG_SERIAL_SC16IS7XX_I2C 1499 i2c_del_driver(&sc16is7xx_i2c_uart_driver); 1500 #endif 1502 uart_unregister_driver(&sc16is7xx_uart); 1503 return ret; 1504 } 1505 module_init(sc16is7xx_init); 1506 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org