static void null_destroy(struct vm_store *store)
	Frees this stores space.

static off_t null_commit(struct vm_store *store, off_t size)
	Sets committed size to size and returns it.

static int null_has_page(struct vm_store *store, off_t offset)
	returns 1.
	
static ssize_t null_read(struct vm_store *store, off_t offset, iovecs *vecs)
	Returns -1.

static ssize_t null_write(struct vm_store *store, off_t offset, iovecs *vecs)
	Returns -1.

static int null_fault(struct vm_store *store, struct vm_address_space *aspace, off_t offset)
	Returns a Fatal page fault error.

vm_store *vm_store_create_null(void)  	
	Creates an empty vm_store struct.