kbuild test robot [off-list ref] writes:

Hi Nicholas,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[cannot apply to v5.3-rc3 next-20190807]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Nicholas-Piggin/powerpc-64s-exception-cleanup-and-macrofiy/20190802-222211
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <redacted>

All errors (new ones prefixed by >>):

   arch/powerpc/platforms/pseries/ras.c: In function 'mce_handle_error':

quoted

quoted

arch/powerpc/platforms/pseries/ras.c:563:28: error: this statement may fall through [-Werror=implicit-fallthrough=]

       mce_err.u.ue_error_type = MCE_UE_ERROR_IFETCH;
       ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
   arch/powerpc/platforms/pseries/ras.c:564:3: note: here
      case MC_ERROR_UE_PAGE_TABLE_WALK_IFETCH:
      ^~~~
   arch/powerpc/platforms/pseries/ras.c:565:28: error: this statement may fall through [-Werror=implicit-fallthrough=]
       mce_err.u.ue_error_type = MCE_UE_ERROR_PAGE_TABLE_WALK_IFETCH;
       ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/powerpc/platforms/pseries/ras.c:566:3: note: here
      case MC_ERROR_UE_LOAD_STORE:
      ^~~~
   arch/powerpc/platforms/pseries/ras.c:567:28: error: this statement may fall through [-Werror=implicit-fallthrough=]
       mce_err.u.ue_error_type = MCE_UE_ERROR_LOAD_STORE;
       ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
   arch/powerpc/platforms/pseries/ras.c:568:3: note: here
      case MC_ERROR_UE_PAGE_TABLE_WALK_LOAD_STORE:
      ^~~~
   arch/powerpc/platforms/pseries/ras.c:569:28: error: this statement may fall through [-Werror=implicit-fallthrough=]
       mce_err.u.ue_error_type = MCE_UE_ERROR_PAGE_TABLE_WALK_LOAD_STORE;
       ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/powerpc/platforms/pseries/ras.c:570:3: note: here
      case MC_ERROR_UE_INDETERMINATE:
      ^~~~
   cc1: all warnings being treated as errors

I think you meant to break in all these cases?

cheers