mark_bootmem      312 mm/bootmem.c   			mark_bootmem(start, pos, 0, 0);
mark_bootmem      360 mm/bootmem.c   	mark_bootmem(start, end, 0, 0);
mark_bootmem      404 mm/bootmem.c   	return mark_bootmem(start, end, 1, flags);