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From: Joe Perches <joe@perches.com>
To: "Valdis Klētnieks" <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>,
	Julia Lawall <julia.lawall@inria.fr>,
	Andy Whitcroft <apw@shadowen.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel-mentees@lists.linuxfoundation.org,
	cocci <cocci@systeme.lip6.fr>
Subject: Re: [Linux-kernel-mentees] [Cocci] coccinelle: Convert comma to semicolons (was Re: [PATCH] checkpatch: Add test for comma use that should be semicolon)
Date: Fri, 21 Aug 2020 22:30:21 -0700	[thread overview]
Message-ID: <3836b482434bd0b9a609959d3696cc6113a93f2f.camel@perches.com> (raw)
In-Reply-To: <162653.1598067338@turing-police>

On Fri, 2020-08-21 at 23:35 -0400, Valdis Klētnieks wrote:
> On Fri, 21 Aug 2020 18:08:08 -0700, Joe Perches said:
> > (forwarding on to kernel-janitors/mentees and kernelnewbies)
> > 
> > Just fyi for anyone that cares:
> > 
> > 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.
> 
> Note that you need to *really* check for possible changes in semantics.
> It's *usually* OK to do that, but sometimes it's not...
> 
> for (i=0; i++, last++; !last) {
> 
> 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.


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  reply	other threads:[~2020-08-22  7:56 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200818184107.f8af232fb58b17160c570874@linux-foundation.org>
     [not found] ` <3bf27caf462007dfa75647b040ab3191374a59de.camel@perches.com>
     [not found]   ` <b0fd63e4b379eda69ee85ab098353582b8c054bb.camel@perches.com>
     [not found]     ` <alpine.DEB.2.22.394.2008201021400.2524@hadrien>
     [not found]       ` <a5713d8597065ef986f780499428fcc4cd31c003.camel@perches.com>
     [not found]         ` <alpine.DEB.2.22.394.2008201856110.2524@hadrien>
2020-08-22  1:08           ` Joe Perches
2020-08-22  3:35             ` Valdis Klētnieks
2020-08-22  5:30               ` Joe Perches [this message]
2020-08-22  7:07                 ` Julia Lawall
2020-09-24 20:19                   ` Thomas Gleixner
2020-09-24 20:21                     ` Julia Lawall
2020-09-24 20:33                     ` Joe Perches
2020-09-24 21:53                       ` Thomas Gleixner
2020-09-24 22:23                         ` Joe Perches
2020-09-25 17:06                           ` Julia Lawall
2020-09-25 17:26                             ` Joe Perches
2020-09-26 19:11                               ` Valdis Klētnieks
2020-09-27 17:08                           ` Julia Lawall
2020-09-27 17:45                             ` Joe Perches
2020-09-27 19:35                               ` Julia Lawall

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