[kbuild-all] [usb:usb-testing 55/56] drivers/usb/typec/tcpm/tcpci.c:118:5: warning: no previous prototype for 'tcpci_apply_rc'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing head: 5cc59c418fde9d02859996707b9d5dfd2941c50b commit: 7257fbc7c598617ca71605089264c61636d52157 [55/56] usb: typec: tcpci: Implement callback for apply_rc config: nds32-allyesconfig (attached as .config) compiler: nds32le-linux-gcc (GCC) 9.3.0 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://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/commit/?id... git remote add usb https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git git fetch --no-tags usb usb-testing git checkout 7257fbc7c598617ca71605089264c61636d52157 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nds32 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 >>): 118 | int tcpci_apply_rc(struct tcpc_dev *tcpc, enum typec_cc_status cc, enum typec_cc_polarity polarity) | ^~~~~~~~~~~~~~ vim +/tcpci_apply_rc +118 drivers/usb/typec/tcpm/tcpci.c 117 119 { 120 struct tcpci *tcpci = tcpc_to_tcpci(tcpc); 121 unsigned int reg; 122 int ret; 123 124 ret = regmap_read(tcpci->regmap, TCPC_ROLE_CTRL, &reg); 125 if (ret < 0) 126 return ret; 127 128 /* 129 * APPLY_RC state is when ROLE_CONTROL.CC1 != ROLE_CONTROL.CC2 and vbus autodischarge on 130 * disconnect is disabled. Bail out when ROLE_CONTROL.CC1 != ROLE_CONTROL.CC2. 131 */ 132 if (((reg & (TCPC_ROLE_CTRL_CC2_MASK << TCPC_ROLE_CTRL_CC2_SHIFT)) >> 133 TCPC_ROLE_CTRL_CC2_SHIFT) != 134 ((reg & (TCPC_ROLE_CTRL_CC1_MASK << TCPC_ROLE_CTRL_CC1_SHIFT)) >> 135 TCPC_ROLE_CTRL_CC1_SHIFT)) 136 return 0; 137 138 return regmap_update_bits(tcpci->regmap, TCPC_ROLE_CTRL, polarity == TYPEC_POLARITY_CC1 ? 139 TCPC_ROLE_CTRL_CC2_MASK << TCPC_ROLE_CTRL_CC2_SHIFT : 140 TCPC_ROLE_CTRL_CC1_MASK << TCPC_ROLE_CTRL_CC1_SHIFT, 141 TCPC_ROLE_CTRL_CC_OPEN); 142 } 143 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org