linux-kernel - Re: [PATCH] checkpatch: detect leading * in NULL comparison check

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Message-ID: <1450039741.20678.7.camel@perches.com>
Date:	Sun, 13 Dec 2015 12:49:01 -0800
From:	Joe Perches <joe@...ches.com>
To:	"S. Gilles" <sgilles@...h.umd.edu>,
	Andy Whitcroft <apw@...onical.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] checkpatch: detect leading * in NULL comparison check

On Sun, 2015-12-13 at 12:59 -0500, S. Gilles wrote:
> Prevent checkpatch.pl from emitting messages like
> 
>   CHECK: Comparison to NULL could be written "!rx_p"
>   #51: FILE: drivers/staging/iio/accel/sca3000_ring.c:51:
>   +       if (*rx_p == NULL) {
> 
> by checking for leading * characters in the comparison value.
> 
> Signed-off-by: S. Gilles <sgilles@...h.umd.edu>
> ---
> 
> I've run this through everything in staging/ as a test, it seems to
> work okay.

This wouldn't work with

	* foo == NULL;

but there don't seem to be any in the kernel source.
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