Hi Vijaya, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on tty/tty-testing] [also build test WARNING on linus/master v5.19-rc5 next-20220708] [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#_base_tree_information] 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/20220708-031921 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing config: arc-randconfig-r004-20220707 (https://download.01.org/0day-ci/archive/20220710/202207100234.kIBTfg5O-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 11.3.0 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/intel-lab-lkp/linux/commit/fbd8a1a4b7d91ea5caa048e4557ab18b0d08ea86 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/20220708-031921 git checkout fbd8a1a4b7d91ea5caa048e4557ab18b0d08ea86 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash drivers/tty/serial/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from include/linux/kernel.h:29, from include/linux/clk.h:13, from drivers/tty/serial/qcom_geni_serial.c:4: drivers/tty/serial/qcom_geni_serial.c: In function 'get_clk_div_rate': >> include/linux/kern_levels.h:5:25: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'unsigned int' [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/printk.h:452:25: note: in definition of macro 'printk_index_wrap' 452 | _p_func(_fmt, ##__VA_ARGS__); \ | ^~~~ include/linux/printk.h:131:17: note: in expansion of macro 'printk' 131 | printk(fmt, ##__VA_ARGS__); \ | ^~~~~~ include/linux/printk.h:610:9: note: in expansion of macro 'no_printk' 610 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~ include/linux/kern_levels.h:15:25: note: in expansion of macro 'KERN_SOH' 15 | #define KERN_DEBUG KERN_SOH "7" /* debug-level messages */ | ^~~~~~~~ include/linux/printk.h:610:19: note: in expansion of macro 'KERN_DEBUG' 610 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~ drivers/tty/serial/qcom_geni_serial.c:1006:17: note: in expansion of macro 'pr_debug' 1006 | pr_debug("desired_clk-%lu, ser_clk-%lu, clk_div-%lu\n", | ^~~~~~~~ vim +5 include/linux/kern_levels.h 314ba3520e513a Joe Perches 2012-07-30 4 04d2c8c83d0e3a Joe Perches 2012-07-30 @5 #define KERN_SOH "\001" /* ASCII Start Of Header */ 04d2c8c83d0e3a Joe Perches 2012-07-30 6 #define KERN_SOH_ASCII '\001' 04d2c8c83d0e3a Joe Perches 2012-07-30 7 -- 0-DAY CI Kernel Test Service https://01.org/lkp