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Date: Sun, 8 Jul 2012 14:17:07 -0700
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Josh Triplett <josh@joshtriplett.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Alessio Igor Bogani <abogani@kernel.org>,
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Subject: Re: [PATCH 6/6] x86: Exit RCU extended QS on notify resume
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On Fri, Jul 06, 2012 at 01:43:29PM -0700, Josh Triplett wrote:
> On Fri, Jul 06, 2012 at 09:33:38AM -0700, Paul E. McKenney wrote:
> > On Fri, Jul 06, 2012 at 02:00:18PM +0200, Frederic Weisbecker wrote:
> > > --- a/arch/x86/Kconfig
> > > +++ b/arch/x86/Kconfig
> > > @@ -95,6 +95,7 @@ config X86
> > >  	select KTIME_SCALAR if X86_32
> > >  	select GENERIC_STRNCPY_FROM_USER
> > >  	select GENERIC_STRNLEN_USER
> > > +	select HAVE_RCU_USER_QS if X86_64
> > 
> > And I will bite yet again.  Why only 64-bit kernels?
> 
> Because HAVE_RCU_USER_QS requires an architecture-specific component,
> and this patch series only added the necessary bits to entry_64.S.

OK, please allow me to rephrase the question.  Why only entry_64.S?  ;-)

							Thanx, Paul