Re: [PATCH v1 2/3] drivers/perf: add DDR Sub-System Driveway PMU driver for Yitian 710 SoC

[kernel test robot]

Hi Shuai,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on soc/for-next]
[also build test WARNING on linus/master v5.19-rc2 next-20220617]
[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/Shuai-Xue/drivers-perf-add-DDR-Sub-System-Driveway-PMU-driver-for-Yitian-710-SoC/20220617-192123
base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20220618/202206180343.eGENefte-lkp@xxxxxxxxx/config)
compiler: aarch64-linux-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/641441c43a62293dd0bae407fda7c229e8689617
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Shuai-Xue/drivers-perf-add-DDR-Sub-System-Driveway-PMU-driver-for-Yitian-710-SoC/20220617-192123
        git checkout 641441c43a62293dd0bae407fda7c229e8689617
        # 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=arm64 SHELL=/bin/bash drivers/perf/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> drivers/perf/alibaba_uncore_drw_pmu.c:97:9: warning: no previous prototype for 'ali_drw_pmu_format_show' [-Wmissing-prototypes]
      97 | ssize_t ali_drw_pmu_format_show(struct device *dev,
         |         ^~~~~~~~~~~~~~~~~~~~~~~
>> drivers/perf/alibaba_uncore_drw_pmu.c:110:9: warning: no previous prototype for 'ali_drw_pmu_event_show' [-Wmissing-prototypes]
     110 | ssize_t ali_drw_pmu_event_show(struct device *dev,
         |         ^~~~~~~~~~~~~~~~~~~~~~


vim +/ali_drw_pmu_format_show +97 drivers/perf/alibaba_uncore_drw_pmu.c

    96	
  > 97	ssize_t ali_drw_pmu_format_show(struct device *dev,
    98					struct device_attribute *attr, char *buf)
    99	{
   100		struct dev_ext_attribute *eattr;
   101	
   102		eattr = container_of(attr, struct dev_ext_attribute, attr);
   103	
   104		return sprintf(buf, "%s\n", (char *)eattr->var);
   105	}
   106	
   107	/*
   108	 * PMU event attributes
   109	 */
 > 110	ssize_t ali_drw_pmu_event_show(struct device *dev,
   111					struct device_attribute *attr, char *page)
   112	{
   113		struct dev_ext_attribute *eattr;
   114	
   115		eattr = container_of(attr, struct dev_ext_attribute, attr);
   116	
   117		return sprintf(page, "config=0x%lx\n", (unsigned long)eattr->var);
   118	}
   119	

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