linux-kernel - Re: [v2 PATCH 2/2] netprio_cgroup: Use memcpy instead of the for-loop to copy priomap

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Message-Id: <20120912.135844.2128028507911988895.davem@davemloft.net>
Date:	Wed, 12 Sep 2012 13:58:44 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	srivatsa.bhat@...ux.vnet.ibm.com
Cc:	nhorman@...driver.com, David.Laight@...lab.com,
	john.r.fastabend@...el.com, gaofeng@...fujitsu.com,
	eric.dumazet@...il.com, mark.d.rustad@...el.com,
	lizefan@...wei.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [v2 PATCH 2/2] netprio_cgroup: Use memcpy instead of the
 for-loop to copy priomap

From: "Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Date: Wed, 12 Sep 2012 13:54:05 +0530

> On 09/12/2012 01:19 PM, David Miller wrote:
>> From: "Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
>> Date: Wed, 12 Sep 2012 11:37:47 +0530
>> 
>>> +		memcpy(new_priomap->priomap, old_priomap->priomap,
>>> +			old_priomap->priomap_len *
>>> +					sizeof(old_priomap->priomap[0]));
>> 
>> This argument indentation is ridiculous.  Try:
>> 
>> 		memcpy(new_priomap->priomap, old_priomap->priomap,
>> 		       old_priomap->priomap_len *
>> 		       sizeof(old_priomap->priomap[0]));
>> 
>> Using TABs exclusively for argumentat indentation is not the goal.
>> 
>> Rather, lining the arguments up properly so that they sit at the first
>> column after the first line's openning parenthesis is what you should
>> be trying to achieve.
> 
> OK, will fix it, thanks!
> 
>> 
>> And ignoring whatever stylistic convention we may or may not have, I
>> find it impossibly hard to believe that the code quoted above looks
>> good even to you.
>>
> 
> On second thoughts, I think the memcpy in this case will actually be worse
> since it will copy the contents in chunks of smaller size than the for-loop.

I meant just coding style wise, not semantically.
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