MAX_PHYSMEM_BITS   21 include/asm-x86/sparsemem.h #  define MAX_PHYSMEM_BITS	36
MAX_PHYSMEM_BITS   25 include/asm-x86/sparsemem.h #  define MAX_PHYSMEM_BITS	32
MAX_PHYSMEM_BITS   30 include/asm-x86/sparsemem.h # define MAX_PHYSMEM_BITS	44