Hi Peter, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on hch-configfs/for-next v5.11-rc3 next-20210113] [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/Peter-Collingbourne/mmc-core-don-t-initialize-block-size-from-ext_csd-if-not-present/20210113-054414 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git e609571b5ffa3528bf85292de1ceaddac342bc1c config: x86_64-rhel (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/562a77dc6c88601c5129c0bbb9141119494320c7 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Peter-Collingbourne/mmc-core-don-t-initialize-block-size-from-ext_csd-if-not-present/20210113-054414 git checkout 562a77dc6c88601c5129c0bbb9141119494320c7 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>, old ones prefixed by <<): >> ERROR: modpost: "mmc_can_ext_csd" [drivers/mmc/core/mmc_block.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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