From: Eric Dumazet <edumazet@google.com>
Date: Sat, 4 Oct 2014 03:59:19 +0000 (-0700)
Subject: net: skb_segment() provides list head and tail
X-Git-Tag: omap-for-v3.19/prcm-cleanup~141^2~34
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bec3cfdca36bf43cfa3751ad7b56db1a307e0760;p=pandora-kernel.git

net: skb_segment() provides list head and tail

Its unfortunate we have to walk again skb list to find the tail
after segmentation, even if data is probably hot in cpu caches.

skb_segment() can store the tail of the list into segs->prev,
and validate_xmit_skb_list() can immediately get the tail.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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