Re: [V3] tty: serial: qcom-geni-serial: Fix get_clk_div_rate() which otherwise could return a sub-optimal clock rate.

From: kernel test robot
Date: Sat Jul 09 2022 - 14:50:09 EST

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]

base: tty-testing
config: arc-randconfig-r004-20220707 (
compiler: arc-elf-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
wget -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git remote add linux-review
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

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