From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 28 Apr 2010 22:31:51 +0000 (-0700)
Subject: net: ip_queue_rcv_skb() helper
X-Git-Tag: v2.6.35-rc1~473^2~303
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f84af32cbca70a3c6d30463dc08c7984af11c277;p=pandora-kernel.git

net: ip_queue_rcv_skb() helper

When queueing a skb to socket, we can immediately release its dst if
target socket do not use IP_CMSG_PKTINFO.

tcp_data_queue() can drop dst too.

This to benefit from a hot cache line and avoid the receiver, possibly
on another cpu, to dirty this cache line himself.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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