call_rcu
call_rcu(&list->rhead, amdgpu_bo_list_free_rcu);
call_rcu(&f->rcu, amdgpu_fence_free);
call_rcu(&s->rcu, __sleep_rcu);
call_rcu(&obj->rcu, __i915_gem_free_object_rcu);
extern void call_rcu(struct rcu_head *head, void (*func)(struct rcu_head *));
call_rcu(&fence->finished.rcu, drm_sched_fence_free);