linux-kernel - Re: [PATCH 2/3] cgroup: add cgroup

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Date:	Fri, 1 Mar 2013 20:39:17 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Li Zefan <lizefan@...wei.com>
Cc:	Tejun Heo <tj@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>
Subject: Re: [PATCH 2/3] cgroup: add cgroup_name() API

On Fri, Mar 01, 2013 at 02:36:29PM +0800, Li Zefan wrote:
> On 2013/2/28 22:49, Tejun Heo wrote:
> > On Wed, Feb 27, 2013 at 10:53 PM, Li Zefan <lizefan@...wei.com> wrote:
> >>> static const struct cgroup_name root_cgroup_name = { .name = "/" };
> >>
> >> Can't... That's char name[0] not char *name.
> > 
> > Flexible array members can be statically initialized. If you wanna be
> > really anal about it, you can do it manually with a wrapping struct
> > but I don't think that would be necessary.
> > 
> 
> I didn't know this difference between flexible array and zero-size array.
> Thanks.

Mind you, initializing flex array member is explicitly invalid per C99;
it's a GNU extension...
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