linux-kernel - Re: [PATCH 24/54] md/raid1: Improve another size determination in setup

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Message-ID: <8352f64b-5d3c-4b13-7650-312300dc8ea3@nod.at>
Date:   Fri, 7 Oct 2016 10:15:26 +0200
From:   Richard Weinberger <richard@....at>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     SF Markus Elfring <elfring@...rs.sourceforge.net>,
        "linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
        Christoph Hellwig <hch@....de>,
        Guoqing Jiang <gqjiang@...e.com>, Jens Axboe <axboe@...com>,
        Mike Christie <mchristi@...hat.com>,
        Neil Brown <neilb@...e.com>, Shaohua Li <shli@...nel.org>,
        Tomasz Majchrzak <tomasz.majchrzak@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH 24/54] md/raid1: Improve another size determination in
 setup_conf()

On 07.10.2016 09:53, Dan Carpenter wrote:
> On Thu, Oct 06, 2016 at 11:29:20AM +0200, Richard Weinberger wrote:
>> On Thu, Oct 6, 2016 at 11:22 AM, SF Markus Elfring
>> <elfring@...rs.sourceforge.net> wrote:
>>> From: Markus Elfring <elfring@...rs.sourceforge.net>
>>> Date: Tue, 4 Oct 2016 21:46:18 +0200
>>>
>>> Replace the specification of a data structure by a pointer dereference
>>> as the parameter for the operator "sizeof" to make the corresponding size
>>> determination a bit safer.
>>
>> Isn't this pure matter of taste?
>> Some developers prefer sizeof(*ptr) because it is easier to type, other
>> developers prefer sizeof(struct foo) because you can determine the type
>> at first sight and makes review more easy.
> 
> sizeof(*ptr) is more future proof and normally more obvious and easier
> to review.

Also a matter of taste.
See http://yarchive.net/comp/linux/struct_init.html

Thanks,
//richard