[PATCH v6] powerpc/kdump: Add support for crashkernel CMA reservation

[kernel test robot]

Hi Sourabh,

kernel test robot noticed the following build warnings:

[auto build test WARNING on powerpc/next]
[also build test WARNING on powerpc/fixes linus/master v6.18-rc4 next-20251106]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Sourabh-Jain/powerpc-kdump-Add-support-for-crashkernel-CMA-reservation/20251104-213036
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
patch link:    https://lore.kernel.org/r/20251104132818.1724562-1-sourabhjain%40linux.ibm.com
patch subject: [PATCH v6] powerpc/kdump: Add support for crashkernel CMA reservation
config: powerpc64-randconfig-r113-20251106 (https://download.01.org/0day-ci/archive/20251106/202511062213.dHidoorr-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251106/202511062213.dHidoorr-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511062213.dHidoorr-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/powerpc/kexec/core.c:62:20: sparse: sparse: symbol 'crashk_cma_size' was not declared. Should it be static?
   arch/powerpc/kexec/core.c:188:29: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long long static [addressable] [toplevel] [usertype] crashk_base @@     got restricted __be64 [usertype] @@
   arch/powerpc/kexec/core.c:188:29: sparse:     expected unsigned long long static [addressable] [toplevel] [usertype] crashk_base
   arch/powerpc/kexec/core.c:188:29: sparse:     got restricted __be64 [usertype]
   arch/powerpc/kexec/core.c:190:29: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long long static [addressable] [toplevel] [usertype] crashk_size @@     got restricted __be64 [usertype] @@
   arch/powerpc/kexec/core.c:190:29: sparse:     expected unsigned long long static [addressable] [toplevel] [usertype] crashk_size
   arch/powerpc/kexec/core.c:190:29: sparse:     got restricted __be64 [usertype]
   arch/powerpc/kexec/core.c:198:19: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long long static [addressable] [toplevel] mem_limit @@     got restricted __be64 [usertype] @@
   arch/powerpc/kexec/core.c:198:19: sparse:     expected unsigned long long static [addressable] [toplevel] mem_limit
   arch/powerpc/kexec/core.c:198:19: sparse:     got restricted __be64 [usertype]
   arch/powerpc/kexec/core.c:214:20: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long long static [addressable] [toplevel] [usertype] kernel_end @@     got restricted __be64 [usertype] @@
   arch/powerpc/kexec/core.c:214:20: sparse:     expected unsigned long long static [addressable] [toplevel] [usertype] kernel_end
   arch/powerpc/kexec/core.c:214:20: sparse:     got restricted __be64 [usertype]

vim +/crashk_cma_size +62 arch/powerpc/kexec/core.c

    61	
  > 62	unsigned long long crashk_cma_size;
    63	

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