From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <shemminger@vyatta.com>
Subject: Re: [PATCH v3 04/12] l2tp: Add ppp device name to L2TP ppp session
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Date: Tue, 30 Mar 2010 09:29:14 -0700
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To: James Chapman <jchapman@katalix.com>
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On Tue, 30 Mar 2010 17:17:46 +0100
James Chapman <jchapman@katalix.com> wrote:

> When dumping L2TP PPP sessions using /proc/net/l2tp, get
> the assigned PPP device name from PPP using ppp_dev_name().
> 
> Signed-off-by: James Chapman <jchapman@katalix.com>
> Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com>
>

Why is this a necessary API?
Why not put it in debugfs if just a debugging tool?