The ornamental design for a frictionlining for a brake pad, as shown and described.
FIG. 1 is a top perspective view of a friction lining for a brake pad showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof; and,
FIG. 4 is a rear view thereof.
The broken line showing the remainder of the friction lining for a brake pad is for illustrative purposes only and forms no part of the claimed design.