tree: git://git.infradead.org/users/hch/misc.git dma-ranges.3 head: 96f925f4d8ede34f7b66ae28c768c0e3a9aa2fd4 commit: 4b50a2c3f5f615d625bfef69c53a10fbfefdc315 [8/11] ARM/dma-mapping: move various helpers from dma-mapping.h to dma-direct.h config: arm-omap1_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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 git checkout 4b50a2c3f5f615d625bfef69c53a10fbfefdc315 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 error/warnings (new ones prefixed by >>): In file included from include/linux/dma-direct.h:18, from kernel/dma/mapping.c:10: arch/arm/include/asm/dma-direct.h: In function 'dma_to_virt': 51 | return __arch_dma_to_virt(dev, addr); | ^~~~~~~~~~~~~~~~~~ 51 | return __arch_dma_to_virt(dev, addr); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors git remote add hch-misc git://git.infradead.org/users/hch/misc.git git fetch --no-tags hch-misc dma-ranges.3 git checkout 4b50a2c3f5f615d625bfef69c53a10fbfefdc315 vim +/__arch_dma_to_virt +51 arch/arm/include/asm/dma-direct.h 48 49 static inline void *dma_to_virt(struct device *dev, dma_addr_t addr) 50 { 52 } 53 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org