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Re: [PATCH 3/4] xfs: simplify xfs_ail_max

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH 3/4] xfs: simplify xfs_ail_max
From: Jeff Liu <jeff.liu@xxxxxxxxxx>
Date: Thu, 26 Dec 2013 18:52:33 +0800
Cc: "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20131226100721.GA11950@xxxxxxxxxxxxx>
References: <52B9829A.10804@xxxxxxxxxx> <20131226100721.GA11950@xxxxxxxxxxxxx>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0
On 12/26 2013 18:07 PM, Christoph Hellwig wrote:
> On Tue, Dec 24, 2013 at 08:48:26PM +0800, Jeff Liu wrote:
>> From: Jie Liu <jeff.liu@xxxxxxxxxx>
>> We have already simplified xfs_ail_min() with a new list helper, i.e,
>> list_first_entry_or_null(), but xfs_ail_max() still remains as same
>> as there is no corresponding list helper we can use for now.  It's
>> fairly easy to simulate the list behavior of getting the last item
>> in the AIL, therefore we can simplify xfs_ail_max() and move it to
>> the header file to make this pair of AIL routines looks symmetrical.
> The usageof list_last_entry is fine with me, as is making it inline.
> But I think using the explicit if is a lot more readable than the ? :
> expression.
Sounds sensible to me, will take care of it.


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