drivers/net/dsa/microchip/ksz9477_i2c.c:77:34: warning: unused variable 'ksz9477_dt_ids'

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

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Hi Tristram,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   bb5baaa9238ecf8f13b112232c7bbe0d3d598ee8
commit: 20e03777d70923fe7eae0d7f043ef9488393ab95 net: dsa: microchip: add KSZ9477 I2C driver
date:   11 months ago
config: x86_64-randconfig-r032-20200812 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 4f2ad15db535873dda9bfe248a2771023b64a43c)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git checkout 20e03777d70923fe7eae0d7f043ef9488393ab95
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

           ^
   include/linux/jhash.h:95:2: note: insert '__attribute__((fallthrough));' to silence this warning
           case 6:  b += (u32)k[5]<<8;     /* fall through */
           ^
           __attribute__((fallthrough)); 
   include/linux/jhash.h:95:2: note: insert 'break;' to avoid fall-through
           case 6:  b += (u32)k[5]<<8;     /* fall through */
           ^
           break; 
   include/linux/jhash.h:96:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           case 5:  b += k[4];             /* fall through */
           ^
   include/linux/jhash.h:96:2: note: insert '__attribute__((fallthrough));' to silence this warning
           case 5:  b += k[4];             /* fall through */
           ^
           __attribute__((fallthrough)); 
   include/linux/jhash.h:96:2: note: insert 'break;' to avoid fall-through
           case 5:  b += k[4];             /* fall through */
           ^
           break; 
   include/linux/jhash.h:97:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           case 4:  a += (u32)k[3]<<24;    /* fall through */
           ^
   include/linux/jhash.h:97:2: note: insert '__attribute__((fallthrough));' to silence this warning
           case 4:  a += (u32)k[3]<<24;    /* fall through */
           ^
           __attribute__((fallthrough)); 
   include/linux/jhash.h:97:2: note: insert 'break;' to avoid fall-through
           case 4:  a += (u32)k[3]<<24;    /* fall through */
           ^
           break; 
   include/linux/jhash.h:98:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           case 3:  a += (u32)k[2]<<16;    /* fall through */
           ^
   include/linux/jhash.h:98:2: note: insert '__attribute__((fallthrough));' to silence this warning
           case 3:  a += (u32)k[2]<<16;    /* fall through */
           ^
           __attribute__((fallthrough)); 
   include/linux/jhash.h:98:2: note: insert 'break;' to avoid fall-through
           case 3:  a += (u32)k[2]<<16;    /* fall through */
           ^
           break; 
   include/linux/jhash.h:99:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           case 2:  a += (u32)k[1]<<8;     /* fall through */
           ^
   include/linux/jhash.h:99:2: note: insert '__attribute__((fallthrough));' to silence this warning
           case 2:  a += (u32)k[1]<<8;     /* fall through */
           ^
           __attribute__((fallthrough)); 
   include/linux/jhash.h:99:2: note: insert 'break;' to avoid fall-through
           case 2:  a += (u32)k[1]<<8;     /* fall through */
           ^
           break; 
   include/linux/jhash.h:100:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           case 1:  a += k[0];
           ^
   include/linux/jhash.h:100:2: note: insert '__attribute__((fallthrough));' to silence this warning
           case 1:  a += k[0];
           ^
           __attribute__((fallthrough)); 
   include/linux/jhash.h:100:2: note: insert 'break;' to avoid fall-through
           case 1:  a += k[0];
           ^
           break; 
   include/linux/jhash.h:102:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           case 0: /* Nothing left to add */
           ^
   include/linux/jhash.h:102:2: note: insert 'break;' to avoid fall-through
           case 0: /* Nothing left to add */
           ^
           break; 
   include/linux/jhash.h:136:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           case 2: b += k[1];      /* fall through */
           ^
   include/linux/jhash.h:136:2: note: insert '__attribute__((fallthrough));' to silence this warning
           case 2: b += k[1];      /* fall through */
           ^
           __attribute__((fallthrough)); 
   include/linux/jhash.h:136:2: note: insert 'break;' to avoid fall-through
           case 2: b += k[1];      /* fall through */
           ^
           break; 
   include/linux/jhash.h:137:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           case 1: a += k[0];
           ^
   include/linux/jhash.h:137:2: note: insert '__attribute__((fallthrough));' to silence this warning
           case 1: a += k[0];
           ^
           __attribute__((fallthrough)); 
   include/linux/jhash.h:137:2: note: insert 'break;' to avoid fall-through
           case 1: a += k[0];
           ^
           break; 
   include/linux/jhash.h:139:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           case 0: /* Nothing left to add */
           ^
   include/linux/jhash.h:139:2: note: insert 'break;' to avoid fall-through
           case 0: /* Nothing left to add */
           ^
           break; 
>> drivers/net/dsa/microchip/ksz9477_i2c.c:77:34: warning: unused variable 'ksz9477_dt_ids' [-Wunused-const-variable]
   static const struct of_device_id ksz9477_dt_ids[] = {
                                    ^
   37 warnings generated.

vim +/ksz9477_dt_ids +77 drivers/net/dsa/microchip/ksz9477_i2c.c

    76	
  > 77	static const struct of_device_id ksz9477_dt_ids[] = {
    78		{ .compatible = "microchip,ksz9477" },
    79		{ .compatible = "microchip,ksz9897" },
    80		{},
    81	};
    82	MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
    83	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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