From: Alexander Duyck <alexander.h.duyck@intel.com>
Date: Wed, 2 May 2012 18:18:42 +0000 (+0000)
Subject: net: Stop decapitating clones that have a head_frag
X-Git-Tag: v3.5-rc1~109^2~188
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2996d31f9f292cce67cd9105dc0a4a5ee43d2f14;p=pandora-kernel.git

net: Stop decapitating clones that have a head_frag

This change is meant ot prevent stealing the skb->head to use as a page in
the event that the skb->head was cloned.  This allows the other clones to
track each other via shinfo->dataref.

Without this we break down to two methods for tracking the reference count,
one being dataref, the other being the page count.  As a result it becomes
difficult to track how many references there are to skb->head.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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