linux-kernel - Re: [PATCH tip/core/rcu 2/4] rcu: Eliminate array-index-based RCU primitives

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Message-ID: <20150514202733.GG6776@linux.vnet.ibm.com>
Date:	Thu, 14 May 2015 13:27:33 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
	rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
	dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com,
	bobby.prani@...il.com, linux-edac@...r.kernel.org,
	Tony Luck <tony.luck@...el.com>
Subject: Re: [PATCH tip/core/rcu 2/4] rcu: Eliminate array-index-based RCU
 primitives

On Wed, May 13, 2015 at 03:08:45PM +0200, Borislav Petkov wrote:
> On Tue, May 12, 2015 at 02:18:42PM -0700, Paul E. McKenney wrote:
> > From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
> > 
> > Now that rcu_access_index() and rcu_dereference_index_check() are no
> > longer used, the commit removes them from the RCU API.  This means that
> > RCU's data dependencies now involve only pointers, give or take the
> > occasional cast to and then back from an integer type to do pointer
> > arithmetic.  This in turn eliminates the need for a number of operations
> > on values carrying RCU data dependencies.
> > 
> > Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> > Cc: linux-edac@...r.kernel.org
> > Cc: Tony Luck <tony.luck@...el.com>
> > Cc: Borislav Petkov <bp@...en8.de>
> > ---
> >  include/linux/rcupdate.h | 50 ------------------------------------------------
> >  1 file changed, 50 deletions(-)
> 
> Diffstats like this one are my favourite ones!

Me too!

> Acked-by: Borislav Petkov <bp@...e.de>

Applied, thank you!

								Thanx, Paul

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