Hi Amireddy, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on robh/for-next] [also build test WARNING on linus/master v5.7 next-20200610] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Amireddy-Mallikarjuna-reddy/Add-Intel-LGM-soc-DMA-support/20200610-202116 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project bc2b70982be8f5250cd0082a7190f8b417bd4dfe) 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 All warnings (new ones prefixed by >>, old ones prefixed by <<): >> drivers/dma/lgm/lgm-dma.c:729:5: warning: no previous prototype for function 'intel_dma_chan_desc_cfg' [-Wmissing-prototypes] int intel_dma_chan_desc_cfg(struct dma_chan *chan, dma_addr_t desc_base, ^ drivers/dma/lgm/lgm-dma.c:729:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int intel_dma_chan_desc_cfg(struct dma_chan *chan, dma_addr_t desc_base, ^ static 1 warning generated. vim +/intel_dma_chan_desc_cfg +729 drivers/dma/lgm/lgm-dma.c 728 > 729 int intel_dma_chan_desc_cfg(struct dma_chan *chan, dma_addr_t desc_base, 730 int desc_num) 731 { 732 return ldma_chan_desc_cfg(to_ldma_chan(chan), desc_base, desc_num); 733 } 734 EXPORT_SYMBOL_GPL(intel_dma_chan_desc_cfg); 735 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org