tree: https://android.googlesource.com/kernel/common android-4.19-stable head: 45c480b553c90178bf1cc30fd9054c75a31bf599 commit: 3b328707cf5e600683b13c9b19de3a3f22ea81e0 [15288/24059] ANDROID: serial: msm_geni_serial_console : Add Earlycon support config: i386-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android-4.19-stable git checkout 3b328707cf5e600683b13c9b19de3a3f22ea81e0 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/tty/serial/msm_geni_serial_console.c: In function 'msm_geni_serial_earlycon_setup': 479 | u32 rx_stale = 0; | ^~~~~~~~ 477 | u32 rx_parity_cfg = 0; | ^~~~~~~~~~~~~ 476 | u32 rx_trans_cfg = 0; | ^~~~~~~~~~~~ vim +/rx_stale +479 drivers/tty/serial/msm_geni_serial_console.c 467 468 static int __init 469 msm_geni_serial_earlycon_setup(struct earlycon_device *dev, 470 const char *opt) 471 { 472 struct uart_port *uport = &dev->port; 473 int ret = 0; 474 u32 tx_trans_cfg = 0; 475 u32 tx_parity_cfg = 0; 478 u32 stop_bit = 0; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org