Hi Ram, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common android12-5.10 head: 06d074249fa373865805136b3d34aeb7c20ee5d2 commit: 072eded7ca22f1dff8f7e151c46274352a8bbf57 [12973/13751] FROMLIST: mmc: core: Export core functions required for clk scaling config: arm-randconfig-r026-20211014 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 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 remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android12-5.10 git checkout 072eded7ca22f1dff8f7e151c46274352a8bbf57 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 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 warnings (new ones prefixed by >>): 975 | void mmc_set_bus_speed(struct mmc_card *card) | ^~~~~~~~~~~~~~~~~ vim +/mmc_set_bus_speed +975 drivers/mmc/core/mmc.c 971 972 /* 973 * Set the bus speed for the selected speed mode. 974 */ 976 { 977 unsigned int max_dtr = (unsigned int)-1; 978 979 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) && 980 max_dtr > card->ext_csd.hs200_max_dtr) 981 max_dtr = card->ext_csd.hs200_max_dtr; 982 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr) 983 max_dtr = card->ext_csd.hs_max_dtr; 984 else if (max_dtr > card->csd.max_dtr) 985 max_dtr = card->csd.max_dtr; 986 987 mmc_set_clock(card->host, max_dtr); 988 } 989 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org