Le lundi 29 mars 2010 à 21:15 +0100, David Howells a écrit : > My objection to using rcu_dereference_check() here is that it's a dynamic > check: the compiler emits code to do it, since the lock/unlock status of what > the pointer points to cannot be determined easily at compiler time - and then > the barrier is interpolated anyway unnecessarily. > Then in this case, use either a condition ORing all possibilities, or just use rcu_dereference_raw() because its just too complex ? ptr = rcu_dereference_check(xxx->ptr, rcu_read_lock_held() || lockdep_is_held(&some_global_lock) || lockdep_is_held(&xxx->lock)); OR /* This is too complex to check what protects us at this point */ ptr = rcu_dereference_raw(xxx->ptr); -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
