linux-kernel - Re: [PATCH] checkpatch giving bogus advice (was staging: goldfish: Fix minor coding style)

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Date:	Mon, 15 Dec 2014 06:08:43 -0800
From:	Jeremiah Mahler <jmmahler@...il.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Loic Pefferkorn <loic@...cp.eu>, gregkh@...uxfoundation.org,
	alan@...ux.intel.com, jun.j.tian@...el.com,
	octavian.purdila@...el.com, nnk@...gle.com,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	apw@...onical.com, joe@...ches.com
Subject: Re: [PATCH] checkpatch giving bogus advice (was staging: goldfish:
 Fix minor coding style)

Dan,

On Mon, Dec 15, 2014 at 04:43:34PM +0300, Dan Carpenter wrote:
> On Mon, Dec 15, 2014 at 05:03:46AM -0800, Jeremiah Mahler wrote:
> > 
> > Or another way mentioned in K&R that produces a compile error
> > 
> >             if (NULL = x) 
> > 
> 
> Yes.  People used to write Yoda code back in the day.  Don't ever do
> this in the kernel.
> 
> 1) It looks stupid.

Agreed :-)

> 2) GCC will catch most == vs = bugs as Alan pointed out.
> 3) There are still some that sneak through because people put double
>    parenthesis around everything like "if ((foo = NULL) || (...)) {",
>    but checkpatch.pl and Smatch will catch those.
> 
> regards,
> dan carpenter
> 

-- 
- Jeremiah Mahler
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