Hi Luis, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.15-rc7 next-20250521] [cannot apply to vkoul-dmaengine/next shuah-kselftest/next shuah-kselftest/fixes sysctl/sysctl-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Luis-Chamberlain/fake-dma-add-fake-dma-engine-driver/20250521-064035 base: linus/master patch link: https://lore.kernel.org/r/20250520223913.3407136-2-mcgrof%40kernel.org patch subject: [PATCH 1/6] fake-dma: add fake dma engine driver config: alpha-randconfig-r113-20250522 (https://download.01.org/0day-ci/archive/20250522/202505220711.3GeHexsR-lkp@xxxxxxxxx/config) compiler: alpha-linux-gcc (GCC) 12.4.0 reproduce: (https://download.01.org/0day-ci/archive/20250522/202505220711.3GeHexsR-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202505220711.3GeHexsR-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> drivers/dma/fake-dma.c:69:24: sparse: sparse: symbol 'single_fake_dma' was not declared. Should it be static? vim +/single_fake_dma +69 drivers/dma/fake-dma.c 68 > 69 struct fake_dma_device *single_fake_dma; 70 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki