[linux-next:master 11468/12451] drivers/net/ethernet/apm/xgene/xgene_enet_main.c:2004:34: warning: unused variable 'xgene_enet_of_match'

[linux-next:master 11468/12451] drivers/net/ethernet/apm/xgene/xgene_enet_main.c:2004:34: warning: unused variable 'xgene_enet_of_match'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   4d0515b235dec789578d135a5db586b25c5870cb
commit: b0377116decdeecb8c6a928d59cd4bea00a4af6e [11468/12451] net: ethernet: Use device_get_match_data()
config: hexagon-randconfig-r005-20221019 (https://download.01.org/0day-ci/archive/20231017/202310170627.2Kvf6ZHY-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231017/202310170627.2Kvf6ZHY-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310170627.2Kvf6ZHY-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/net/ethernet/apm/xgene/xgene_enet_main.c:11:
   In file included from drivers/net/ethernet/apm/xgene/xgene_enet_main.h:15:
   In file included from include/linux/efi.h:20:
   In file included from include/linux/rtc.h:17:
   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:337:
   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/net/ethernet/apm/xgene/xgene_enet_main.c:11:
   In file included from drivers/net/ethernet/apm/xgene/xgene_enet_main.h:15:
   In file included from include/linux/efi.h:20:
   In file included from include/linux/rtc.h:17:
   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:337:
   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/net/ethernet/apm/xgene/xgene_enet_main.c:11:
   In file included from drivers/net/ethernet/apm/xgene/xgene_enet_main.h:15:
   In file included from include/linux/efi.h:20:
   In file included from include/linux/rtc.h:17:
   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:337:
   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/net/ethernet/apm/xgene/xgene_enet_main.c:2004:34: warning: unused variable 'xgene_enet_of_match' [-Wunused-const-variable]
   static const struct of_device_id xgene_enet_of_match[] = {
                                    ^
   7 warnings generated.


vim +/xgene_enet_of_match +2004 drivers/net/ethernet/apm/xgene/xgene_enet_main.c

1f3d62090d3ba4 Arnd Bergmann 2017-02-01  2003  
1f3d62090d3ba4 Arnd Bergmann 2017-02-01 @2004  static const struct of_device_id xgene_enet_of_match[] = {
1f3d62090d3ba4 Arnd Bergmann 2017-02-01  2005  	{.compatible = "apm,xgene-enet",    .data = (void *)XGENE_ENET1},
1f3d62090d3ba4 Arnd Bergmann 2017-02-01  2006  	{.compatible = "apm,xgene1-sgenet", .data = (void *)XGENE_ENET1},
1f3d62090d3ba4 Arnd Bergmann 2017-02-01  2007  	{.compatible = "apm,xgene1-xgenet", .data = (void *)XGENE_ENET1},
1f3d62090d3ba4 Arnd Bergmann 2017-02-01  2008  	{.compatible = "apm,xgene2-sgenet", .data = (void *)XGENE_ENET2},
1f3d62090d3ba4 Arnd Bergmann 2017-02-01  2009  	{.compatible = "apm,xgene2-xgenet", .data = (void *)XGENE_ENET2},
1f3d62090d3ba4 Arnd Bergmann 2017-02-01  2010  	{},
1f3d62090d3ba4 Arnd Bergmann 2017-02-01  2011  };
1f3d62090d3ba4 Arnd Bergmann 2017-02-01  2012  

:::::: The code at line 2004 was first introduced by commit
:::::: 1f3d62090d3ba4d0c14e5271be87812fc577b197 xgene_enet: remove bogus forward declarations

:::::: TO: Arnd Bergmann <arnd@arndb.de>
:::::: CC: David S. Miller <davem@davemloft.net>

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