Re: [PATCH next v2 3/4] serial: 8250: Switch to nbcon console

[kernel test robot <lkp@intel.com>]

Hi John,

kernel test robot noticed the following build warnings:

[auto build test WARNING on b794563ea12fb46d9499da9e30c33d9607e33697]

url:    https://github.com/intel-lab-lkp/linux/commits/John-Ogness/serial-8250-Split-out-IER-from-rs485_start_tx/20240913-220810
base:   b794563ea12fb46d9499da9e30c33d9607e33697
patch link:    https://lore.kernel.org/r/20240913140538.221708-4-john.ogness%40linutronix.de
patch subject: [PATCH next v2 3/4] serial: 8250: Switch to nbcon console
config: arc-randconfig-001-20240914 (https://download.01.org/0day-ci/archive/20240914/202409140437.EP0Ryw3u-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240914/202409140437.EP0Ryw3u-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409140437.EP0Ryw3u-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/tty/serial/8250/8250_port.c:1904:13: warning: 'modem_status_handler' defined but not used [-Wunused-function]
    1904 | static void modem_status_handler(struct irq_work *iwp)
         |             ^~~~~~~~~~~~~~~~~~~~


vim +/modem_status_handler +1904 drivers/tty/serial/8250/8250_port.c

  1898	
  1899	/*
  1900	 * irq_work handler to perform modem control. Only triggered via
  1901	 * write_atomic() callback because it may be in a scheduler or NMI
  1902	 * context, unable to wake tasks.
  1903	 */
> 1904	static void modem_status_handler(struct irq_work *iwp)
  1905	{
  1906		struct uart_8250_port *up = container_of(iwp, struct uart_8250_port, modem_status_work);
  1907		struct uart_port *port = &up->port;
  1908	
  1909		uart_port_lock(port);
  1910		serial8250_modem_status(up);
  1911		uart_port_unlock(port);
  1912	}
  1913	

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