From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 8 Jun 2011 06:07:07 +0000 (+0000)
Subject: net: pmtu_expires fixes
X-Git-Tag: v3.0-rc3~13^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fe6fe792faec3fc2d2db39b69651682b8c4e7fcb;p=pandora-kernel.git

net: pmtu_expires fixes

commit 2c8cec5c10bc (ipv4: Cache learned PMTU information in inetpeer)
added some racy peer->pmtu_expires accesses.

As its value can be changed by another cpu/thread, we should be more
careful, reading its value once.

Add peer_pmtu_expired() and peer_pmtu_cleaned() helpers

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