linux-kernel - Re: Adding plain accesses and detecting data races in the LKMM

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Message-Id: <20190415135320.GW14111@linux.ibm.com>
Date:   Mon, 15 Apr 2019 06:53:20 -0700
From:   "Paul E. McKenney" <paulmck@...ux.ibm.com>
To:     Alan Stern <stern@...land.harvard.edu>
Cc:     Andrea Parri <andrea.parri@...rulasolutions.com>,
        LKMM Maintainers -- Akira Yokosawa <akiyks@...il.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Daniel Lustig <dlustig@...dia.com>,
        David Howells <dhowells@...hat.com>,
        Jade Alglave <j.alglave@....ac.uk>,
        Luc Maranget <luc.maranget@...ia.fr>,
        Nicholas Piggin <npiggin@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will.deacon@....com>,
        Daniel Kroening <kroening@...ox.ac.uk>,
        Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: Adding plain accesses and detecting data races in the LKMM

On Mon, Apr 15, 2019 at 09:50:03AM -0400, Alan Stern wrote:
> On Mon, 15 Apr 2019, Paul E. McKenney wrote:
> 
> > Another question is "should the kernel permit smp_mb__{before,after}*()
> > anywhere other than immediately before or after the primitive being
> > strengthened?"
> > 
> > Thoughts?
> 
> How would the kernel forbid other constructions?

Coccinelle scripts added to 0day test robot.

							Thanx, Paul