linux-kernel - Re: [PATCH 04/11] cgroup: use kzalloc() and list_del

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Message-ID: <20130613023831.GB10979@localhost>
Date:	Wed, 12 Jun 2013 19:38:31 -0700
From:	Kent Overstreet <koverstreet@...gle.com>
To:	Li Zefan <lizefan@...wei.com>
Cc:	Tejun Heo <tj@...nel.org>, containers@...ts.linux-foundation.org,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
	cl@...ux-foundation.org
Subject: Re: [PATCH 04/11] cgroup: use kzalloc() and list_del_init()

On Thu, Jun 13, 2013 at 10:36:40AM +0800, Li Zefan wrote:
> On 2013/6/13 5:03, Tejun Heo wrote:
> > There's no point in using kmalloc() and list_del() instead of the
> > clearing variants for trivial stuff.  We can live dangerously
> > elsewhere.  Use kzalloc() and list_del_init() instead and drop 0
> > inits.
> > 
> 
> Do you mean we prefer list_del_init() than list_del() in general? Then
> in which cases do we prefer list_del()?

IMO, list_del() is preferred when the object shouldn't be reused (i.e.
it gets taken off a list and then it's freed). list_del_init() could
hide bugs.
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