From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andy Whitcroft <apw-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
Subject: Re: [RFC 1/4] ARM: topology: Add arch_scale_freq_power function
Date: Wed, 13 Jun 2012 20:27:40 +0100
Message-ID: <20120613192740.GZ5878@dm>
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To: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: linaro-dev-cunTk1MwBs8s++Sfvej+rw@public.gmane.org, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org, linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
List-Id: devicetree@vger.kernel.org

On Wed, Jun 13, 2012 at 02:52:49PM +0200, Peter Zijlstra wrote:
> On Tue, 2012-06-12 at 14:02 +0200, Vincent Guittot wrote:
> >         }
> >         smp_wmb();
> >  } 
> 
> You know what.. we should make checkpatch report an error for memory
> barriers that don't have a comment. 
> 
> I know this isn't added by this patch, but every time I see something
> like it I cry a little.

Actually if it was a new line, it would have been reported, at least in
theory:

    # check for memory barriers without a comment.
		    if ($line =~
    /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/)
    {
	if (!ctx_has_comment($first_line, $linenr)) {
	    CHK("MEMORY_BARRIER",
		"memory barrier without comment\n" . $herecurr);
	}
    }

-apw