linux-kernel - Re: [PATCH 06/13] cpuset: cleanup cpuset[_can]

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Date:	Wed, 26 Dec 2012 18:20:11 +0800
From:	Li Zefan <lizefan@...wei.com>
To:	Tejun Heo <tj@...nel.org>
CC:	<paul@...lmenage.org>, <glommer@...allels.com>,
	<containers@...ts.linux-foundation.org>, <cgroups@...r.kernel.org>,
	<peterz@...radead.org>, <mhocko@...e.cz>, <bsingharora@...il.com>,
	<hannes@...xchg.org>, <kamezawa.hiroyu@...fujitsu.com>,
	<linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/13] cpuset: cleanup cpuset[_can]_attach()

On 2012/11/29 5:34, Tejun Heo wrote:
> cpuset_can_attach() prepare global variables cpus_attach and
> cpuset_attach_nodemask_{to|from} which are used by cpuset_attach().
> There is no reason to prepare in cpuset_can_attach().  The same
> information can be accessed from cpuset_attach().
> 
> Move the prepartion logic from cpuset_can_attach() to cpuset_attach()
> and make the global variables static ones inside cpuset_attach().
> 
> While at it, convert cpus_attach to cpumask_t from cpumask_var_t.
> There's no reason to mess with dynamic allocation on a static buffer.
> 

But Rusty had been deprecating the use of cpumask_t. I don't know why
the final deprecation hasn't been completed yet.
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