[kbuild-all] [linux-chenxing:mstar_v5_14_rebase 123/352] drivers/spi/spi-msc313.c:154:6: warning: no previous prototype for 'msc313_spi_set_cs'

tree: git://github.com/linux-chenxing/linux.git mstar_v5_14_rebase head: 651efd0e52f225e60faa8b30f9768021e2104d3c commit: e39640d415b9c96ba82e287dadb7b73138058c76 [123/352] ARM: mstar: MSC313 SPI driver config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0 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://github.com/linux-chenxing/linux/commit/e39640d415b9c96ba82e287dad... git remote add linux-chenxing git://github.com/linux-chenxing/linux.git git fetch --no-tags linux-chenxing mstar_v5_14_rebase git checkout e39640d415b9c96ba82e287dadb7b73138058c76 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arm 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 >>): 154 | void msc313_spi_set_cs(struct spi_device *spi, bool enable){ | ^~~~~~~~~~~~~~~~~ drivers/spi/spi-msc313.c: In function 'msc313_spi_remove': drivers/spi/spi-msc313.c:322:21: warning: unused variable 'spi' [-Wunused-variable] 322 | struct msc313_spi *spi = spi_master_get_devdata(master); | ^~~ vim +/msc313_spi_set_cs +154 drivers/spi/spi-msc313.c 153 155 struct msc313_spi *mspi = spi_master_get_devdata(spi->master); 156 if(enable) 157 regmap_update_bits(mspi->regmap, REG_CS, CS_MASK, CS_MASK); 158 else 159 regmap_update_bits(mspi->regmap, REG_CS, CS_MASK, 0); 160 } 161 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org