linux-kernel - Re: [PATCH 5/20] Introduce struct upid

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Message-Id: <20070814130558.4b5e5e3f.akpm@linux-foundation.org>
Date:	Tue, 14 Aug 2007 13:05:58 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	xemul@...nvz.org
Cc:	devel@...nvz.org, linux-kernel@...r.kernel.org,
	containers@...ts.osdl.org, oleg@...sign.ru, sukadev@...ibm.com
Subject: Re: [PATCH 5/20] Introduce struct upid

On Fri, 10 Aug 2007 15:47:59 +0400
xemul@...nvz.org wrote:

>  struct pid
>  {
>  	atomic_t count;
> @@ -50,6 +50,8 @@ struct pid
>  	/* lists of tasks that use this pid */
>  	struct hlist_head tasks[PIDTYPE_MAX];
>  	struct rcu_head rcu;
> +	int level;
> +	struct upid numbers[1];

You can make this have size [0] now.  It's a gcc extension and
is used elsewhere in the kernel.
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