Hi Faiz, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y head: e864f43593ccf9180c61738abdf1c1dde091367d commit: 6811f1727af00233db22f67559b9e924e6c19593 [8380/9999] mmc: sdhci-omap: Add platform specific reset callback config: microblaze-randconfig-r033-20200913 (attached as .config) compiler: microblaze-linux-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 6811f1727af00233db22f67559b9e924e6c19593 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze 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 >>): 704 | void sdhci_omap_reset(struct sdhci_host *host, u8 mask) | ^~~~~~~~~~~~~~~~ # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-4.19.y git checkout 6811f1727af00233db22f67559b9e924e6c19593 vim +/sdhci_omap_reset +704 drivers/mmc/host/sdhci-omap.c 703 705 { 706 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 707 struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 708 709 /* Don't reset data lines during tuning operation */ 710 if (omap_host->is_tuning) 711 mask &= ~SDHCI_RESET_DATA; 712 713 sdhci_reset(host, mask); 714 } 715 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org