Im not sure what you mean keep the tent rolled up. I cut a 15" piece of reflective 275 p cord. Tie a loop at one end and attach that to the tent stake loop. Then tie a taughtline hitch on the other end of the p cord. Put that around your stake and slide the hitch knot to tighten. The knot takes the place of the line lock.
See and I would offer that the stake loop offers zero extension so no need to be able to go that short.