Hi, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.1-rc6 next-20190418] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/guoren-kernel-org/riscv-Support-non-coherency-memory-model/20190423-075013 config: riscv-tinyconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 8.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=8.1.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): arch/riscv/mm/dma-mapping.c: In function 'arch_dma_prep_coherent': >> arch/riscv/mm/dma-mapping.c:15:2: error: implicit declaration of function 'sbi_fence_dma' [-Werror=implicit-function-declaration] sbi_fence_dma(page_to_phys(page), size, DMA_BIDIRECTIONAL); ^~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/sbi_fence_dma +15 arch/riscv/mm/dma-mapping.c 10 11 void arch_dma_prep_coherent(struct page *page, size_t size) 12 { 13 memset(page_address(page), 0, size); 14 > 15 sbi_fence_dma(page_to_phys(page), size, DMA_BIDIRECTIONAL); 16 } 17 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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