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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] 6lowpan: Remove unused pointer in
 lowpan_header_create()
Date: Mon, 10 Feb 2014 12:25:06 -0800 (PST)
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From: Alexander Aring <alex.aring@gmail.com>
Date: Mon, 10 Feb 2014 18:40:58 +0100

> I need the hdr pointer for my upcomming patches. Nevertheless it
> should be removed... it's not used anymore.
> 
> I am wondering why this patch was accepted, it's not a bug fix. Is
> net-next open again?

Unused variables make code difficult to audit for bugs and similar.

Sometimes I apply patches like these for net, net-next is not open
yet.