On Tue, Oct 06, 2015 at 09:13:45AM -0700, Paul E. McKenney wrote:
> /**
> + * rcu_pointer_handoff() - Hand off a pointer from RCU to other mechanism
> + * @p: The pointer to hand off
> + *
> + * This is simply an identity function, but it documents where a pointer
> + * is handed off from RCU to some other synchronization mechanism, for
> + * example, reference counting or locking. In C11, it would map to
> + * kill_dependency(). It could be used as follows:
> + *
> + * rcu_read_lock();
> + * p = rcu_dereference(gp);
> + * long_lived = is_long_lived(p);
> + * if (long_lived) {
> + * if (!atomic_inc_not_zero(p->refcnt))
> + * long_lived = false;
> + * else
> + * p = rcu_pointer_handoff(p);
> + * }
> + * rcu_read_unlock();
> + */
> +#define rcu_pointer_handoff(p) (p)
Will you actually be using this? It seems a tad pointless to add if you
don't.
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