From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1753165AbbGALz7 (ORCPT <rfc822;w@1wt.eu>);
	Wed, 1 Jul 2015 07:55:59 -0400
Received: from smtprelay06.ispgateway.de ([80.67.31.96]:42060 "EHLO
	smtprelay06.ispgateway.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1750935AbbGALzv (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Wed, 1 Jul 2015 07:55:51 -0400
Message-ID: <5593D4F5.1090106@ladisch.de>
Date: Wed, 01 Jul 2015 13:54:29 +0200
From: Clemens Ladisch <clemens@ladisch.de>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0
MIME-Version: 1.0
To: Joe Perches <joe@perches.com>, LKML <linux-kernel@vger.kernel.org>
CC: Dan Carpenter <dan.carpenter@oracle.com>,
        Julia Lawall <julia.lawall@lip6.fr>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: RFC: kernel coding style: prefer array to &array[0] ?
References: <1435685746.12101.18.camel@perches.com>
In-Reply-To: <1435685746.12101.18.camel@perches.com>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Df-Sender: bGludXgta2VybmVsQGNsLmRvbWFpbmZhY3Rvcnkta3VuZGUuZGU=
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Joe Perches wrote:
> It seems most in-kernel uses are 'array' rather than '&array[0]'
>
> Most of the time, using array is simpler to read than &array[0].
>
> Exceptions exists when addresses for consecutive members are
> used like func(&array[0], &array[1]);

I use '&array[0]' when I want to get a pointer to a single object that
happens to be the first one in an array.

> Should this preference be put into checkpatch and/or CodingStyle?

How about the following low-hanging fruit?

  foo(..., &array[0], ARRAY_SIZE(array), ...)


Regards,
Clemens