linux-kernel - Re: [PATCH 2/4] futex,plist: remove debug lock assignment for plist

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Message-ID: <4D119353.9030401@cn.fujitsu.com>
Date:	Wed, 22 Dec 2010 13:57:39 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	Darren Hart <dvhart@...ux.intel.com>
CC:	Peter Zijlstra <peterz@...radead.org>,
	John Kacur <jkacur@...hat.com>,
	James Bottomley <James.Bottomley@...e.de>,
	Ingo Molnar <mingo@...e.hu>, "Rafael J. Wysocki" <rjw@...k.pl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Namhyung Kim <namhyung@...il.com>,
	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH 2/4] futex,plist: remove debug lock assignment for plist_node

On 12/22/2010 03:14 AM, Darren Hart wrote:
> On 12/21/2010 01:55 AM, Lai Jiangshan wrote:
>> original code use&plist_node->plist as the faked head of
>> the priority list for plist_del(), these debug locks in
>> the faked head are needed for CONFIG_DEBUG_PI_LIST.
>>
>> But now we always pass the real head to plist_del(), the debug locks
>> in plist_node will not be used, so we remove these assignments.
> 
> Any reason to keep this separate from  patch 1/4 ?
> 

Make the changes clearer and the patches are easier to read.
For me the purposes of patch 1/4 and 2/4 are different,
1/4 makes the code sensible. 2/4 removes unused code.
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