linux-kernel - Re: [PATCH 4/5] ide: Add support for TRIM

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Message-ID: <49D4E9EB.80207@ru.mvista.com>
Date:	Thu, 02 Apr 2009 20:38:03 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Matthew Wilcox <willy@...ux.intel.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	jgarzik@...hat.com, David Woodhouse <David.Woodhouse@...el.com>
Subject: Re: [PATCH 4/5] ide: Add support for TRIM

Hello.

Matthew Wilcox wrote:

>>> +static int idedisk_prepare_discard(struct request_queue *q, struct 
>>>request *rq,
>>>+							struct bio *bio)

>>   Weird indentation.

> Not at all.  New line, so tab the next line over as far as it will go
> without falling off the 80-column limit.  It's fairly common.

> To quote Documentation/CodingStyle:

>   Statements longer than 80 columns will be broken into sensible chunks.
>   Descendants are always substantially shorter than the parent and are placed
>   substantially to the right. The same applies to function headers with a long
>   argument list. Long strings are as well broken into shorter strings.  The
>   only exception to this is where exceeding 80 columns significantly increases
>   readability and does not hide information.

    That's all clear, it's just that the second line was overly indented, at 
least to my taste. :-)

>>>+{
>>>+	ide_task_t *task;

>>   This patch is already obsolete as 'ide_task_t' is gone. Use 'struct  
>>ide_cmd' instead.

> Thanks, fixed.

>>>+	unsigned size;
>>>+	struct page *page = alloc_page(GFP_KERNEL);

>>   Missing empty line after the declaration block...

> Empty line not necessary.

    Usually it's there.

>>>+	task->tf_flags   = IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB |
>>>+			   IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE |

>>   The last 3 flags are going to be obsoleted too...

> So if I remove them today, the command will still work?

     s/obsoleted/renamed and moved to another other field/ -- I'm going to 
submit a patchset refactoring 'struct ide_cmd and 'struct ide-taskfile' at last...

MBR, Sergei
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