Hi Vincent, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.13 next-20210630] [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/Vincent-Whitchurch/mmc-dw_mmc-Add-data-CRC-error-injection/20210630-182344 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 007b350a58754a93ca9fe50c498cc27780171153 config: arm-buildonly-randconfig-r005-20210630 (attached as .config) compiler: arm-linux-gnueabi-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 # https://github.com/0day-ci/linux/commit/c77ecd0f5373a88c7f00191136827f5bc42f3948 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Vincent-Whitchurch/mmc-dw_mmc-Add-data-CRC-error-injection/20210630-182344 git checkout c77ecd0f5373a88c7f00191136827f5bc42f3948 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): drivers/mmc/host/dw_mmc.c: In function 'dw_mci_start_fault_timer': >> drivers/mmc/host/dw_mmc.c:1826:21: error: implicit declaration of function 'prandom_u32' [-Werror=implicit-function-declaration] 1826 | ms_to_ktime(prandom_u32() % 25), | ^~~~~~~~~~~ cc1: some warnings being treated as errors vim +/prandom_u32 +1826 drivers/mmc/host/dw_mmc.c 1811 1812 static void dw_mci_start_fault_timer(struct dw_mci *host) 1813 { 1814 struct mmc_data *data = host->data; 1815 1816 if (!data || data->blocks <= 1) 1817 return; 1818 1819 if (!should_fail(&host->fail_data_crc, 1)) 1820 return; 1821 1822 /* 1823 * Try to inject the error at random points during the data transfer. 1824 */ 1825 hrtimer_start(&host->fault_timer, > 1826 ms_to_ktime(prandom_u32() % 25), 1827 HRTIMER_MODE_REL); 1828 } 1829 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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