drivers/bluetooth/btnxpuart.c:1277:34: warning: unused variable 'nxpuart_of_match_table'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   89d77f71f493a3663b10fa812d17f472935d24be
commit: 689ca16e523278470c38832a3010645a78c544d8 Bluetooth: NXP: Add protocol support for NXP Bluetooth chipsets
date:   6 days ago
config: hexagon-randconfig-r045-20230428 (https://download.01.org/0day-ci/archive/20230430/202304300014.vFGw6Dr0-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 437b7602e4a998220871de78afcb020b9c14a661)
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=689ca16e523278470c38832a3010645a78c544d8
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 689ca16e523278470c38832a3010645a78c544d8
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/bluetooth/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202304300014.vFGw6Dr0-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

   In file included from drivers/bluetooth/btnxpuart.c:10:
   In file included from include/linux/serdev.h:10:
   In file included from include/linux/iopoll.h:14:
   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/bluetooth/btnxpuart.c:10:
   In file included from include/linux/serdev.h:10:
   In file included from include/linux/iopoll.h:14:
   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/bluetooth/btnxpuart.c:10:
   In file included from include/linux/serdev.h:10:
   In file included from include/linux/iopoll.h:14:
   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/bluetooth/btnxpuart.c:1277:34: warning: unused variable 'nxpuart_of_match_table' [-Wunused-const-variable]
   static const struct of_device_id nxpuart_of_match_table[] = {
                                    ^
   7 warnings generated.


vim +/nxpuart_of_match_table +1277 drivers/bluetooth/btnxpuart.c

  1276	
> 1277	static const struct of_device_id nxpuart_of_match_table[] = {
  1278		{ .compatible = "nxp,88w8987-bt", .data = &w8987_data },
  1279		{ .compatible = "nxp,88w8997-bt", .data = &w8997_data },
  1280		{ }
  1281	};
  1282	MODULE_DEVICE_TABLE(of, nxpuart_of_match_table);
  1283	

-- 
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https://github.com/intel/lkp-tests