Hi Vijaya, Thank you for the patch! Yet something to improve: [auto build test ERROR on tty/tty-testing] [also build test ERROR on linus/master v5.19-rc3 next-20220622] [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/intel-lab-lkp/linux/commits/Vijaya-Krishna-Nivarthi/tty-serial-qcom-geni-serial-Fix-get_clk_div_rate-which-otherwise-could-return-a-sub-optimal-clock-rate/20220622-015826 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing config: arm-randconfig-r036-20220622 (https://download.01.org/0day-ci/archive/20220623/202206230511.W02MMaf8-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 8b8d126598ce7bd5243da7f94f69fa1104288bee) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/intel-lab-lkp/linux/commit/668659f1481053090a9dbe9c83bd769de527a5c2 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Vijaya-Krishna-Nivarthi/tty-serial-qcom-geni-serial-Fix-get_clk_div_rate-which-otherwise-could-return-a-sub-optimal-clock-rate/20220622-015826 git checkout 668659f1481053090a9dbe9c83bd769de527a5c2 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: __aeabi_uldivmod >>> referenced by qcom_geni_serial.c >>> tty/serial/qcom_geni_serial.o:(find_clk_rate_in_tol) in archive drivers/built-in.a >>> did you mean: __aeabi_uidivmod >>> defined in: arch/arm/lib/lib.a(lib1funcs.o) -- 0-DAY CI Kernel Test Service https://01.org/lkp