[kbuild-all] [broonie-misc:spi-5.18 8/9] drivers/spi/spi-sunplus-sp7021.c:127:5: warning: no previous prototype for 'sp7021_spi_slave_tx'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git spi-5.18 head: a708078eeb992799161e794d9c569cf4f725a5b0 commit: f62ca4e2a863033d9b3b5a00a0d897557c9da6c5 [8/9] spi: Add spi driver for Sunplus SP7021 config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20220126/202201260353.yX7WVJXz-lk...) compiler: m68k-linux-gcc (GCC) 11.2.0 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/broonie/misc.git/commit/?... git remote add broonie-misc https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git git fetch --no-tags broonie-misc spi-5.18 git checkout f62ca4e2a863033d9b3b5a00a0d897557c9da6c5 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash 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 >>): 127 | int sp7021_spi_slave_tx(struct spi_device *spi, struct spi_transfer *xfer) | ^~~~~~~~~~~~~~~~~~~ 145 | int sp7021_spi_slave_rx(struct spi_device *spi, struct spi_transfer *xfer) | ^~~~~~~~~~~~~~~~~~~ 163 | void sp7021_spi_master_rb(struct sp7021_spi_ctlr *pspim, unsigned int len) | ^~~~~~~~~~~~~~~~~~~~ 174 | void sp7021_spi_master_wb(struct sp7021_spi_ctlr *pspim, unsigned int len) | ^~~~~~~~~~~~~~~~~~~~ drivers/spi/spi-sunplus-sp7021.c:568:12: warning: 'sp7021_spi_runtime_resume' defined but not used [-Wunused-function] 568 | static int sp7021_spi_runtime_resume(struct device *dev) | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/spi/spi-sunplus-sp7021.c:560:12: warning: 'sp7021_spi_runtime_suspend' defined but not used [-Wunused-function] 560 | static int sp7021_spi_runtime_suspend(struct device *dev) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/sp7021_spi_slave_tx +127 drivers/spi/spi-sunplus-sp7021.c 126 128 { 129 struct sp7021_spi_ctlr *pspim = spi_controller_get_devdata(spi->controller); 130 131 reinit_completion(&pspim->slave_isr); 132 writel(SP7021_SLAVE_DMA_EN | SP7021_SLAVE_DMA_RW | FIELD_PREP(SP7021_SLAVE_DMA_CMD, 3), 133 pspim->s_base + SP7021_SLAVE_DMA_CTRL_REG); 134 writel(xfer->len, pspim->s_base + SP7021_SLAVE_DMA_LENGTH_REG); 135 writel(xfer->tx_dma, pspim->s_base + SP7021_SLAVE_DMA_ADDR_REG); 136 writel(readl(pspim->s_base + SP7021_DATA_RDY_REG) | SP7021_SLAVE_DATA_RDY, 137 pspim->s_base + SP7021_DATA_RDY_REG); 138 if (wait_for_completion_interruptible(&pspim->isr_done)) { 139 dev_err(&spi->dev, "%s() wait_for_completion err\n", __func__); 140 return -EINTR; 141 } 142 return 0; 143 } 144 146 { 147 struct sp7021_spi_ctlr *pspim = spi_controller_get_devdata(spi->controller); 148 int ret = 0; 149 150 reinit_completion(&pspim->isr_done); 151 writel(SP7021_SLAVE_DMA_EN | FIELD_PREP(SP7021_SLAVE_DMA_CMD, 3), 152 pspim->s_base + SP7021_SLAVE_DMA_CTRL_REG); 153 writel(xfer->len, pspim->s_base + SP7021_SLAVE_DMA_LENGTH_REG); 154 writel(xfer->rx_dma, pspim->s_base + SP7021_SLAVE_DMA_ADDR_REG); 155 if (wait_for_completion_interruptible(&pspim->isr_done)) { 156 dev_err(&spi->dev, "%s() wait_for_completion err\n", __func__); 157 return -EINTR; 158 } 159 writel(SP7021_SLAVE_SW_RST, pspim->s_base + SP7021_SLAVE_DMA_CTRL_REG); 160 return ret; 161 } 162 164 { 165 int i; 166 167 for (i = 0; i < len; i++) { 168 pspim->rx_buf[pspim->rx_cur_len] = 169 readl(pspim->m_base + SP7021_FIFO_REG); 170 pspim->rx_cur_len++; 171 } 172 } 173 175 { 176 int i; 177 178 for (i = 0; i < len; i++) { 179 writel(pspim->tx_buf[pspim->tx_cur_len], 180 pspim->m_base + SP7021_FIFO_REG); 181 pspim->tx_cur_len++; 182 } 183 } 184 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org