Re: [PATCH 2/3] rcu: Create rcu_sync infrastructure

[Peter Zijlstra]

On Fri, Oct 04, 2013 at 01:15:13PM +0200, Oleg Nesterov wrote:
> Of course we can fix this, but wait_for_completion/complete already
> does the necessary work: x->done acts as a resource counter which is
> always checked/incremented/decremented under the same lock.

Urgh, so now you're not using a semaphore as completion but using a
completion as semaphore.


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