Re: [PATCH v3 1/7] driver/perf: Add identifier sysfs file for CMN

[kernel test robot <lkp@intel.com>]

Hi Jing,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/perf/core]
[also build test WARNING on acme/perf/core arm-perf/for-next/perf linus/master v6.4-rc4 next-20230530]
[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/Jing-Zhang/driver-perf-Add-identifier-sysfs-file-for-CMN/20230530-172139
base:   tip/perf/core
patch link:    https://lore.kernel.org/r/1685438374-33287-2-git-send-email-renyu.zj%40linux.alibaba.com
patch subject: [PATCH v3 1/7] driver/perf: Add identifier sysfs file for CMN
config: hexagon-buildonly-randconfig-r006-20230530 (https://download.01.org/0day-ci/archive/20230531/202305311005.YR2SisSe-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        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/c7483d062f1b91e98b028fa720b8a98b94ec9bc5
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jing-Zhang/driver-perf-Add-identifier-sysfs-file-for-CMN/20230530-172139
        git checkout c7483d062f1b91e98b028fa720b8a98b94ec9bc5
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/perf/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202305311005.YR2SisSe-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/perf/arm-cmn.c:9:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __raw_readb(PCI_IOBASE + addr);
                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from drivers/perf/arm-cmn.c:9:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from drivers/perf/arm-cmn.c:9:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writeb(value, PCI_IOBASE + addr);
                               ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
>> drivers/perf/arm-cmn.c:2379:41: warning: unused variable 'arm_cmn600_data' [-Wunused-const-variable]
   static const struct arm_cmn_device_data arm_cmn600_data = {
                                           ^
>> drivers/perf/arm-cmn.c:2384:41: warning: unused variable 'arm_cmn650_data' [-Wunused-const-variable]
   static const struct arm_cmn_device_data arm_cmn650_data = {
                                           ^
>> drivers/perf/arm-cmn.c:2389:41: warning: unused variable 'arm_cmn700_data' [-Wunused-const-variable]
   static const struct arm_cmn_device_data arm_cmn700_data = {
                                           ^
>> drivers/perf/arm-cmn.c:2394:41: warning: unused variable 'arm_ci700_data' [-Wunused-const-variable]
   static const struct arm_cmn_device_data arm_ci700_data = {
                                           ^
   10 warnings generated.


vim +/arm_cmn600_data +2379 drivers/perf/arm-cmn.c

  2378	
> 2379	static const struct arm_cmn_device_data arm_cmn600_data = {
  2380		.model_name = "arm_cmn600",
  2381		.model = CMN600
  2382	};
  2383	
> 2384	static const struct arm_cmn_device_data arm_cmn650_data = {
  2385		.model_name = "arm_cmn650",
  2386		.model = CMN650
  2387	};
  2388	
> 2389	static const struct arm_cmn_device_data arm_cmn700_data = {
  2390		.model_name = "arm_cmn700",
  2391		.model = CMN700
  2392	};
  2393	
> 2394	static const struct arm_cmn_device_data arm_ci700_data = {
  2395		.model_name = "arm_ci700",
  2396		.model = CI700
  2397	};
  2398	

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