linux-kernel - Re: [RFC][PATCH 1/5] pid: Implement ns_of

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Message-ID: <20081202115841.GC1132@wavehammer.waldi.eu.org>
Date:	Tue, 2 Dec 2008 12:58:41 +0100
From:	Bastian Blank <bastian@...di.eu.org>
To:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Cc:	oleg@...hat.com, ebiederm@...ssion.com, roland@...hat.com,
	containers@...ts.osdl.org, linux-kernel@...r.kernel.org,
	xemul@...nvz.org
Subject: Re: [RFC][PATCH 1/5] pid: Implement ns_of_pid

On Mon, Dec 01, 2008 at 12:24:22PM -0800, Sukadev Bhattiprolu wrote:
> Bastian Blank [bastian@...di.eu.org] wrote:
> | On Tue, Nov 25, 2008 at 07:44:42PM -0800, Sukadev Bhattiprolu wrote:
> | > +/* ns_of_pid returns the pid namespace in which the specified
> | > + * pid was allocated.
> | > + */
> | > +static inline struct pid_namespace *ns_of_pid(struct pid *pid)
> | > +{
> | > +	struct pid_namespace *ns = NULL;
> | > +	if (pid)
> | > +		ns = pid->numbers[pid->level].ns;
> | > +	return ns;
> | > +}
> | > +
> | When can the pid argument be null?
> Soon after creation but more importantly, after detach_pid()
> (release_task).

pid is a function argument and the function does not call detach_pid. So
please try again.

Bastian

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