From: Eric Dumazet <edumazet@google.com>
Date: Thu, 10 Oct 2013 00:14:52 +0000 (-0700)
Subject: tcp: use ACCESS_ONCE() in tcp_update_pacing_rate()
X-Git-Tag: v3.13-rc1~105^2~196
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba537427d77cf274592f31ce94f4b4cadfad88b4;p=pandora-kernel.git

tcp: use ACCESS_ONCE() in tcp_update_pacing_rate()

sk_pacing_rate is read by sch_fq packet scheduler at any time,
with no synchronization, so make sure we update it in a
sensible way. ACCESS_ONCE() is how we instruct compiler
to not do stupid things, like using the memory location
as a temporary variable.

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

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