Hi Adrian, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on spi/for-next] [also build test WARNING on v5.8-rc3 next-20200703] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Adrian-Fiergolski/spi-Add-the-SPI-daisy-chain-support/20200703-221615 base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project ca464639a1c9dd3944eb055ffd2796e8c2e7639f) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/spi/spi-daisy_chain.c:232:6: warning: no previous prototype for function 'spi_daisy_chain_clean' [-Wmissing-prototypes] void spi_daisy_chain_clean(struct list_head *daisy_chain_devs) ^ drivers/spi/spi-daisy_chain.c:232:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void spi_daisy_chain_clean(struct list_head *daisy_chain_devs) ^ static 1 warning generated. vim +/spi_daisy_chain_clean +232 drivers/spi/spi-daisy_chain.c 231 > 232 void spi_daisy_chain_clean(struct list_head *daisy_chain_devs) 233 { 234 struct spi_device *spi_dev; 235 struct spi_daisy_chain_device *spi_chain_dev; 236 237 list_for_each_entry(spi_chain_dev, daisy_chain_devs, devices) { 238 spi_dev = spi_chain_dev->spi; 239 spi_dev_put(spi_dev); 240 kfree(spi_chain_dev->no_operation.tx_buf); 241 kfree(spi_chain_dev); 242 } 243 list_del(daisy_chain_devs); 244 kfree(daisy_chain_devs); 245 } 246 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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