MAX_POSSIBLE_PHYSMEM_BITS   48 arch/x86/include/asm/pgtable-3level_types.h #define MAX_POSSIBLE_PHYSMEM_BITS	36
MAX_POSSIBLE_PHYSMEM_BITS   67 arch/x86/include/asm/pgtable_64_types.h #define MAX_POSSIBLE_PHYSMEM_BITS	52
MAX_POSSIBLE_PHYSMEM_BITS   91 mm/zsmalloc.c  #define MAX_POSSIBLE_PHYSMEM_BITS MAX_PHYSMEM_BITS
MAX_POSSIBLE_PHYSMEM_BITS   97 mm/zsmalloc.c  #define MAX_POSSIBLE_PHYSMEM_BITS BITS_PER_LONG