Hi Kumaravel, I love your patch! Perhaps something to improve: [auto build test WARNING on tty/tty-testing] [also build test WARNING on tty/tty-next tty/tty-linus usb/usb-testing usb/usb-next usb/usb-linus linus/master v6.2-rc6 next-20230203] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Kumaravel-Thiagarajan/serial-8250_pci-Add-serial8250_pci_setup_port-definition-in-8250_pcilib-c/20230204-005851 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing patch link: https://lore.kernel.org/r/20230204053138.2520105-2-kumaravel.thiagarajan%40microchip.com patch subject: [PATCH v11 tty-next 1/4] serial: 8250_pci: Add serial8250_pci_setup_port definition in 8250_pcilib.c config: x86_64-randconfig-a001 (https://download.01.org/0day-ci/archive/20230205/202302050831.9fyXKlIq-lkp@xxxxxxxxx/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1) 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/intel-lab-lkp/linux/commit/cd5f521fabae71343d59d524ad57221e2b7524fe git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Kumaravel-Thiagarajan/serial-8250_pci-Add-serial8250_pci_setup_port-definition-in-8250_pcilib-c/20230204-005851 git checkout cd5f521fabae71343d59d524ad57221e2b7524fe # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/tty/serial/8250/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/tty/serial/8250/8250_pcilib.c:14:5: warning: no previous prototype for function 'serial8250_pci_setup_port' [-Wmissing-prototypes] int serial8250_pci_setup_port(struct pci_dev *dev, struct uart_8250_port *port, ^ drivers/tty/serial/8250/8250_pcilib.c:14:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int serial8250_pci_setup_port(struct pci_dev *dev, struct uart_8250_port *port, ^ static 1 warning generated. vim +/serial8250_pci_setup_port +14 drivers/tty/serial/8250/8250_pcilib.c 13 > 14 int serial8250_pci_setup_port(struct pci_dev *dev, struct uart_8250_port *port, -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests