i915_active_acquire_preallocate_barrier
err = i915_active_acquire_preallocate_barrier(&ce->active,
err = i915_active_acquire_preallocate_barrier(&p->active, engine);
int i915_active_acquire_preallocate_barrier(struct i915_active *ref,
err = i915_active_acquire_preallocate_barrier(&active->base,