dma_fence_remove_callback
dma_fence_remove_callback(fences[i], &cb[i].base);
dma_fence_remove_callback(entries[i].fence,
dma_fence_remove_callback(&rq->fence, &wait.cb);
bool dma_fence_remove_callback(struct dma_fence *, struct dma_fence_cb *);
dma_fence_remove_callback(f, &cb.base);
dma_fence_remove_callback(entity->dependency, &entity->cb);
dma_fence_remove_callback(s_job->s_fence->parent,