All symbols starting with `i' in osfmk/vm

• IKOT_PAGER_LOOKUP_TYPE osfmk/vm/vm_object.c:2310
• interruptible osfmk/vm/vm_fault.c:3266
• ipc_kernel_map osfmk/vm/vm_kern.h:165
• IP_NULL osfmk/vm/memory_object.c:109
• is_sub_map osfmk/vm/vm_map.h:159