Re: [PATCH 3/3] hotplug: Optimize cpu_hotplug_{begin,done}() usingrcu_sync

[Peter Zijlstra]

On Thu, Oct 03, 2013 at 09:48:38AM -0700, Paul E. McKenney wrote:
> > -enum { readers_fast = 0, readers_slow, readers_block };
> > +enum { readers_slow, readers_block };
> 
> It took me a bit to realize that readers_fast is obsoleted by the
> rcu_sync_is_idle() above.  ;-)

Yeah.. I pondered changing/adding to the rcu_sync interface to allow
using gp_count like status to avoid the extra variable, but decided
against it for now.
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