drivers/media/platform/intel/pxa_camera.c:2449:34: warning: unused variable 'pxa_camera_of_match'

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

Hi Mauro,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   44889ba56cbb3d51154660ccd15818bc77276696
commit: 95495f2aa9d8df1a7697bab24118544d3568f41d media: platform: place Intel drivers on a separate dir
date:   12 months ago
config: s390-randconfig-r036-20230310 (https://download.01.org/0day-ci/archive/20230310/202303102157.PBgdEYPB-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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
        # install s390 cross compiling tool for clang build
        # apt-get install binutils-s390x-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=95495f2aa9d8df1a7697bab24118544d3568f41d
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 95495f2aa9d8df1a7697bab24118544d3568f41d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/media/platform/intel/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303102157.PBgdEYPB-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/media/platform/intel/pxa_camera.c:12:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:464:31: 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:477:61: 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/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
                                                             ^
   include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
   #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
                                                        ^
   In file included from drivers/media/platform/intel/pxa_camera.c:12:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:490:61: 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/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
                                                             ^
   include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
   #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
                                                        ^
   In file included from drivers/media/platform/intel/pxa_camera.c:12:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:501:33: 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:511:59: 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:521:59: 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);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsb(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsw(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsl(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesb(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesw(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesl(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
>> drivers/media/platform/intel/pxa_camera.c:2449:34: warning: unused variable 'pxa_camera_of_match' [-Wunused-const-variable]
   static const struct of_device_id pxa_camera_of_match[] = {
                                    ^
   13 warnings generated.


vim +/pxa_camera_of_match +2449 drivers/media/platform/intel/pxa_camera.c

7254026cedd42d drivers/media/video/pxa_camera.c               Guennadi Liakhovetski 2011-06-29  2448  
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik        2014-06-29 @2449  static const struct of_device_id pxa_camera_of_match[] = {
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik        2014-06-29  2450  	{ .compatible = "marvell,pxa270-qci", },
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik        2014-06-29  2451  	{},
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik        2014-06-29  2452  };
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik        2014-06-29  2453  MODULE_DEVICE_TABLE(of, pxa_camera_of_match);
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik        2014-06-29  2454  

:::::: The code at line 2449 was first introduced by commit
:::::: e9a1d94fa85542d4f3046ac82d234a3c8349c948 [media] media: pxa_camera device-tree support

:::::: TO: Robert Jarzmik <robert.jarzmik@free.fr>
:::::: CC: Mauro Carvalho Chehab <m.chehab@samsung.com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests