Hi Johan, I love your patch! Perhaps something to improve: [auto build test WARNING on tty/tty-testing] [also build test WARNING on usb/usb-testing v5.12-rc8 next-20210421] [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/Johan-Hovold/serial-extend-compile-test-coverage/20210421-234950 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing config: x86_64-randconfig-a014-20210421 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d87b9b81ccb95217181ce75515c6c68bbb408ca4) 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://github.com/0day-ci/linux/commit/c010530fa587261662c6abdb59ade994645dcfa8 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Johan-Hovold/serial-extend-compile-test-coverage/20210421-234950 git checkout c010530fa587261662c6abdb59ade994645dcfa8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/tty/serial/serial_txx9.c:987:12: warning: no previous prototype for function 'early_serial_txx9_setup' [-Wmissing-prototypes] int __init early_serial_txx9_setup(struct uart_port *port) ^ drivers/tty/serial/serial_txx9.c:987:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __init early_serial_txx9_setup(struct uart_port *port) ^ static 1 warning generated. vim +/early_serial_txx9_setup +987 drivers/tty/serial/serial_txx9.c ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 986 ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 @987 int __init early_serial_txx9_setup(struct uart_port *port) ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 988 { ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 989 if (port->line >= ARRAY_SIZE(serial_txx9_ports)) ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 990 return -ENODEV; ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 991 ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 992 serial_txx9_ports[port->line].port = *port; ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 993 serial_txx9_ports[port->line].port.ops = &serial_txx9_pops; 37a6c7d0096bb5 drivers/serial/serial_txx9.c Atsushi Nemoto 2007-10-16 994 serial_txx9_ports[port->line].port.flags |= 37a6c7d0096bb5 drivers/serial/serial_txx9.c Atsushi Nemoto 2007-10-16 995 UPF_BOOT_AUTOCONF | UPF_FIXED_PORT; ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 996 return 0; ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 997 } ^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 998 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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