On Thu, 28 May 2015 16:35:27 -0400 Dan Streetman <ddstr...@ieee.org> wrote:
> Add list_last_or_null_rcu(), to simplify getting the last entry from a > rcu-protected list. The standard list_last_entry() can't be used as it > is not rcu-protected; the list may be modified concurrently. And the > ->prev pointer can't be used, as only the ->next pointers are protected > by rcu. > > This simply iterates forward through the entire list, to get to the last > entry. If the list is empty, it returns NULL. May I asked what this would be used for? It seems awfully inefficient in its implementation. What use cases would this be for? I hate to add something like this as a generic function which would encourage people to use it. Iterating over an entire list to find the last element is just nasty. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
