linux-kernel - Re: [PATCH] checkpatch: Whine about ACCESS

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Message-ID: <1460836099.19090.82.camel@perches.com>
Date:	Sat, 16 Apr 2016 12:48:19 -0700
From:	Joe Perches <joe@...ches.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Whitcroft <apw@...dowen.org>,
	Julia Lawall <julia.lawall@...6.fr>
Cc:	linux-kernel@...r.kernel.org, Davidlohr Bueso <dbueso@...e.de>,
	Davidlohr Bueso <dave@...olabs.net>
Subject: Re: [PATCH] checkpatch: Whine about ACCESS_ONCE

On Sat, 2016-04-16 at 12:04 -0700, Joe Perches wrote:
> Add a test for use of ACCESS_ONCE that could be written using
> READ_ONCE or WRITE_ONCE.
> 
> --fix it too if desired.

And here's a simple coccinelle script that does a
rather better job:

$ cat access_once.cocci
@@
expression e1;
expression e2;
@@

-	ACCESS_ONCE(e1) = e2
+	WRITE_ONCE(e1, e2)

@@
expression e1;
@@

-	ACCESS_ONCE(e1)
+	READ_ONCE(e1)