int_alloc_resource
r = int_alloc_resource(M_NOWAIT);
new = int_alloc_resource(M_WAITOK);
new = int_alloc_resource(M_WAITOK);
rv = int_alloc_resource(M_NOWAIT);
r = int_alloc_resource(M_NOWAIT);
rv = int_alloc_resource(M_NOWAIT);