Re: [PATCH v7 1/3] llist: Add a lock-less list variant terminated by a sentinel node

[Tejun Heo]

On Mon, Oct 03, 2022 at 12:55:24PM -0400, Waiman Long wrote:
> That was my original plan. However, after looking at some existing users of
> lockless list, they have coded in the dependency on the fact that a lockless
> list is empty if it is NULL. I guess I can make this true also for the new
> lockless list with sentinel at the expense of a bit more overhead in the
> entry insertion path and deletion path. I will take a further look at that.

There aren't that many users of llist. Maybe it'd be easier / cleaner to
introduce a macro to test whether a llist is empty and replace the NULL
tests?

Thanks.

-- 
tejun