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

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Date:	Mon, 15 Dec 2014 16:50:57 -0800
From:	Joe Perches <joe@...ches.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Jeremiah Mahler <jmmahler@...il.com>,
	devel@...verdev.osuosl.org, gregkh@...uxfoundation.org,
	jun.j.tian@...el.com, linux-kernel@...r.kernel.org,
	octavian.purdila@...el.com, apw@...onical.com, nnk@...gle.com,
	alan@...ux.intel.com
Subject: Re: [PATCH] checkpatch giving bogus advice (was staging: goldfish:
 Fix minor coding style)

On Mon, 2014-12-15 at 14:59 +0300, Dan Carpenter wrote:
> I prefer !foo because it is more common in the kernel and I think it's
> easier to read but I don't feel strongly about this.

Me too.  But I do prefer consistency.

fyi: for variants of:

	"if (!foo)"
vs
	"if (foo == NULL)"

a little cocci script shows a preference for "if (!foo)"
of >5:1 in drivers/net/
(actual: 11557:2145)
and a little less (>3:1) in net/
(actual: 10263:3045)

$ cat pointer_style.cocci
@@
type T;
T *a;
@@

*	a == NULL

@@
type T;
T *a;
@@

*	a != NULL

@@
type T;
T *a;
@@

*	!a


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