Re: [PATCH v4] perf: arm_cspmu: Separate Arm and vendor module

[kernel test robot]

Hi Besar,

kernel test robot noticed the following build warnings:

[auto build test WARNING on ea8d1c062a0e876e999e4f347daeb598d5e677ab]

url:    https://github.com/intel-lab-lkp/linux/commits/Besar-Wicaksono/perf-arm_cspmu-Separate-Arm-and-vendor-module/20230620-121723
base:   ea8d1c062a0e876e999e4f347daeb598d5e677ab
patch link:    https://lore.kernel.org/r/20230620041438.32514-1-bwicaksono%40nvidia.com
patch subject: [PATCH v4] perf: arm_cspmu: Separate Arm and vendor module
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20230620/202306201854.S2tjTpWE-lkp@xxxxxxxxx/config)
compiler: aarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230620/202306201854.S2tjTpWE-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306201854.S2tjTpWE-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> drivers/perf/arm_cspmu/arm_cspmu.c:386:30: warning: no previous prototype for 'arm_cspmu_impl_match_get' [-Wmissing-prototypes]
     386 | struct arm_cspmu_impl_match *arm_cspmu_impl_match_get(u32 pmiidr)
         |                              ^~~~~~~~~~~~~~~~~~~~~~~~


vim +/arm_cspmu_impl_match_get +386 drivers/perf/arm_cspmu/arm_cspmu.c

   385	
 > 386	struct arm_cspmu_impl_match *arm_cspmu_impl_match_get(u32 pmiidr)
   387	{
   388		struct arm_cspmu_impl_match *match = impl_match;
   389	
   390		for (; match->pmiidr_val; match++) {
   391			u32 mask = match->pmiidr_mask;
   392	
   393			if ((match->pmiidr_val & mask) == (pmiidr & mask))
   394				break;
   395		}
   396	
   397		return match;
   398	}
   399	

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