[PATCH v6 04/46] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks

[Steven Rostedt]

On Mon, 2013-02-18 at 21:51 +0530, Srivatsa S. Bhat wrote:
> Hi Michel,

> Yes.. I don't think we can avoid that. Moreover, since we _want_ unfair
> reader/writer semantics to allow flexible locking rules and guarantee
> deadlock-safety, having a recursive reader side is not even an issue, IMHO.

Recursive unfair reader lock may guarantee deadlock-safety, but
remember, it adds a higher probability of live-locking the write_lock.
Which is another argument to keep this separate to cpu hotplug only.

-- Steve