kernel test robot reports unused variable warning:
   arch/nds32/kernel/setup.c:247:26: warning: Unused variable: region
   [unusedVariable]
    struct memblock_region *region;
                            ^
Remove the unused variable.
Link: https://lkml.kernel.org/r/20210712125218.28951-1-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
        unsigned long ram_start_pfn;
        unsigned long free_ram_start_pfn;
        phys_addr_t memory_start, memory_end;
-       struct memblock_region *region;
 
        memory_end = memory_start = 0;