Hi Crescent, kernel test robot noticed the following build warnings: [auto build test WARNING on tty/tty-testing] [also build test WARNING on tty/tty-next next-20231027] [cannot apply to tty/tty-linus usb/usb-testing usb/usb-next usb/usb-linus linus/master v6.6-rc7] [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/Crescent-CY-Hsieh/tty-serial-8250-Fix-MOXA-RS422-RS485-PCIe-boards-not-work-by-default/20231027-142745 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing patch link: https://lore.kernel.org/r/20231027062440.7749-2-crescentcy.hsieh%40moxa.com patch subject: [PATCH 1/2] tty: serial: 8250: Fix MOXA RS422/RS485 PCIe boards not work by default config: i386-randconfig-002-20231028 (https://download.01.org/0day-ci/archive/20231028/202310281723.0DAslF1o-lkp@xxxxxxxxx/config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231028/202310281723.0DAslF1o-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310281723.0DAslF1o-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/tty/serial/8250/8250_pci.c:2001:5: warning: no previous declaration for 'pci_moxa_supported_rs' [-Wmissing-declarations] u32 pci_moxa_supported_rs(struct pci_dev *dev) ^~~~~~~~~~~~~~~~~~~~~ vim +/pci_moxa_supported_rs +2001 drivers/tty/serial/8250/8250_pci.c 2000 > 2001 u32 pci_moxa_supported_rs(struct pci_dev *dev) 2002 { 2003 switch (dev->device & 0x0F00) { 2004 case 0x0000: 2005 case 0x0600: 2006 return MOXA_SUPP_RS232; 2007 case 0x0100: 2008 return MOXA_SUPP_RS232 | MOXA_SUPP_RS422 | MOXA_SUPP_RS485; 2009 case 0x0300: 2010 return MOXA_SUPP_RS422 | MOXA_SUPP_RS485; 2011 } 2012 return 0; 2013 } 2014 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
