Hi Larisa,

kernel test robot noticed the following build warnings:

[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 robh/for-next linus/master v6.19 next-20260216] [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/Larisa-Grigore/serial-linflex... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing patch link: https://lore.kernel.org/r/20260216150205.212318-13-larisa.grigore%40oss.nxp.... patch subject: [PATCH 12/13] serial: linflexuart: Add DMA support config: parisc-randconfig-001-20260217 (https://download.01.org/0day-ci/archive/20260217/202602170428.SOCWu0Wb-lkp@i...) compiler: hppa-linux-gcc (GCC) 15.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260217/202602170428.SOCWu0Wb-lkp@i...)

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@intel.com | Closes: https://lore.kernel.org/oe-kbuild-all/202602170428.SOCWu0Wb-lkp@intel.com/

All warnings (new ones prefixed by >>):

...

drivers/tty/serial/fsl_linflexuart.c:205:13: warning: 'linflex_console_putchar' declared 'static' but never defined [-Wunused-function]

205 | static void linflex_console_putchar(struct uart_port *port, unsigned char ch); | ^~~~~~~~~~~~~~~~~~~~~~~

vim +205 drivers/tty/serial/fsl_linflexuart.c

202 203 static void linflex_dma_tx_complete(void *arg); 204 static void linflex_dma_rx_complete(void *arg);

205 static void linflex_console_putchar(struct uart_port *port, unsigned char ch);

206