Re: [PATCH 4/4] powerpc: ibmebus: make ibmebus_bus_type const

[kernel test robot]

Hi Ricardo,

kernel test robot noticed the following build errors:

[auto build test ERROR on 41bccc98fb7931d63d03f326a746ac4d429c1dd3]

url:    https://github.com/intel-lab-lkp/linux/commits/Ricardo-B-Marliere/powerpc-vio-move-device-attributes-into-a-new-ifdef/20240210-080925
base:   41bccc98fb7931d63d03f326a746ac4d429c1dd3
patch link:    https://lore.kernel.org/r/20240209-bus_cleanup-powerpc2-v1-4-79a56dcaebb1%40marliere.net
patch subject: [PATCH 4/4] powerpc: ibmebus: make ibmebus_bus_type const
config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20240211/202402110615.H1X3DSiC-lkp@xxxxxxxxx/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project ac0577177f053ba7e7016e1b7e44cf5932d00b03)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240211/202402110615.H1X3DSiC-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402110615.H1X3DSiC-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> arch/powerpc/platforms/pseries/ibmebus.c:58:17: error: redefinition of 'ibmebus_bus_type' with a different type: 'struct bus_type' vs 'const struct bus_type'
      58 | struct bus_type ibmebus_bus_type;
         |                 ^
   arch/powerpc/include/asm/ibmebus.h:51:30: note: previous declaration is here
      51 | extern const struct bus_type ibmebus_bus_type;
         |                              ^
   arch/powerpc/platforms/pseries/ibmebus.c:134:17: warning: shift count >= width of type [-Wshift-count-overflow]
     134 |         return mask == DMA_BIT_MASK(64);
         |                        ^~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:77:54: note: expanded from macro 'DMA_BIT_MASK'
      77 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
         |                                                      ^ ~~~
   arch/powerpc/platforms/pseries/ibmebus.c:139:9: warning: shift count >= width of type [-Wshift-count-overflow]
     139 |         return DMA_BIT_MASK(64);
         |                ^~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:77:54: note: expanded from macro 'DMA_BIT_MASK'
      77 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
         |                                                      ^ ~~~
   2 warnings and 1 error generated.


vim +58 arch/powerpc/platforms/pseries/ibmebus.c

d7a301033f1990 arch/powerpc/kernel/ibmebus.c Heiko J Schick 2005-11-16  57  
6bccf755ff5324 arch/powerpc/kernel/ibmebus.c Joachim Fenkes 2007-03-09 @58  struct bus_type ibmebus_bus_type;
6bccf755ff5324 arch/powerpc/kernel/ibmebus.c Joachim Fenkes 2007-03-09  59  

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