From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joe Perches <joe@perches.com>
Date: Sat, 22 Aug 2020 05:30:21 +0000
Subject: Re: [Cocci] coccinelle: Convert comma to semicolons (was Re: [PATCH] checkpatch: Add test for comma 
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To: Valdis =?UTF-8?Q?Kl=C4=93tnieks?= <valdis.kletnieks@vt.edu>
Cc: Giuseppe Scrivano <gscrivan@redhat.com>, kernelnewbies <kernelnewbies@kernelnewbies.org>, kernel-janitors <kernel-janitors@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, Andy Whitcroft <apw@shadowen.org>, Andrew Morton <akpm@linux-foundation.org>, linux-kernel-mentees@lists.linuxfoundation.org, cocci <cocci@systeme.lip6.fr>

On Fri, 2020-08-21 at 23:35 -0400, Valdis Kl=C4=93tnieks wrote:
> On Fri, 21 Aug 2020 18:08:08 -0700, Joe Perches said:
> > (forwarding on to kernel-janitors/mentees and kernelnewbies)
> >=20
> > Just fyi for anyone that cares:
> >=20
> > A janitorial task for someone might be to use Julia's coccinelle
> > script below to convert the existing instances of commas that
> > separate statements into semicolons.
>=20
> Note that you need to *really* check for possible changes in semantics.
> It's *usually* OK to do that, but sometimes it's not...
>=20
> for (i=3D0; i++, last++; !last) {
>=20
> changing that comma to a ; will break the compile.  In other cases, it can
> introduce subtle bugs.

True enough for a general statement, though the coccinelle
script Julia provided does not change a single instance of
for loop expressions with commas.

As far as I can tell, no logic defect is introduced by the
script at all.