radeon_test_create_and_emit_fence
r = radeon_test_create_and_emit_fence(rdev, ringA, &fence1);
r = radeon_test_create_and_emit_fence(rdev, ringA, &fence2);
r = radeon_test_create_and_emit_fence(rdev, ringA, &fenceA);
r = radeon_test_create_and_emit_fence(rdev, ringB, &fenceB);