Hi Neil, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on linus/master] [also build test WARNING on v5.13-rc5 next-20210608] [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] url: https://github.com/0day-ci/linux/commits/Neil-Armstrong/mmc-meson-gx-use-... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 614124bea77e452aa6df7a8714e8bc820b489922 config: mips-randconfig-s031-20210608 (attached as .config) compiler: mips-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/2058382d3f2ac13e79a3402e8992bf41b... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Neil-Armstrong/mmc-meson-gx-use-memcpy_to-fromio-for-dram-access-quirk/20210608-233729 git checkout 2058382d3f2ac13e79a3402e8992bf41bca22748 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) command-line: note: in included file: builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined builtin:0:0: sparse: this was the original definition builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined builtin:0:0: sparse: this was the original definition builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined builtin:0:0: sparse: this was the original definition builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined builtin:0:0: sparse: this was the original definition drivers/mmc/host/meson-gx-mmc.c:774:49: sparse: expected void volatile [noderef] __iomem *dst drivers/mmc/host/meson-gx-mmc.c:774:49: sparse: got void * drivers/mmc/host/meson-gx-mmc.c:776:63: sparse: expected void const volatile [noderef] __iomem *src drivers/mmc/host/meson-gx-mmc.c:776:63: sparse: got void * drivers/mmc/host/meson-gx-mmc.c:1222:34: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *bounce_buf @@ got void [noderef] __iomem * @@ drivers/mmc/host/meson-gx-mmc.c:1222:34: sparse: expected void *bounce_buf drivers/mmc/host/meson-gx-mmc.c:1222:34: sparse: got void [noderef] __iomem * vim +774 drivers/mmc/host/meson-gx-mmc.c 747 748 /* local sg copy to buffer version with _to/fromio usage for dram_access_quirk */ 749 static void meson_mmc_copy_buffer(struct meson_host *host, struct mmc_data *data, 750 size_t buflen, bool to_buffer) 751 { 752 unsigned int sg_flags = SG_MITER_ATOMIC; 753 struct scatterlist *sgl = data->sg; 754 unsigned int nents = data->sg_len; 755 struct sg_mapping_iter miter; 756 void *buf = host->bounce_buf; 757 unsigned int offset = 0; 758 759 if (to_buffer) 760 sg_flags |= SG_MITER_FROM_SG; 761 else 762 sg_flags |= SG_MITER_TO_SG; 763 764 sg_miter_start(&miter, sgl, nents, sg_flags); 765 766 while ((offset < buflen) && sg_miter_next(&miter)) { 767 unsigned int len; 768 769 len = min(miter.length, buflen - offset); 770 771 /* When dram_access_quirk, the bounce buffer is a iomem mapping */ 772 if (host->dram_access_quirk) { 773 if (to_buffer) 775 else 777 } else { 778 if (to_buffer) 779 memcpy(buf + offset, miter.addr, len); 780 else 781 memcpy(miter.addr, buf + offset, len); 782 } 783 784 offset += len; 785 } 786 787 sg_miter_stop(&miter); 788 } 789 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org