From: Changli Gao <xiaosuo@gmail.com>
Date: Sun, 8 Aug 2010 03:35:43 +0000 (-0700)
Subject: net: disable preemption before call smp_processor_id()
X-Git-Tag: v2.6.36-rc1~305^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cece1945bffcf1a823cdfa36669beae118419351;p=pandora-kernel.git

net: disable preemption before call smp_processor_id()

Although netif_rx() isn't expected to be called in process context with
preemption enabled, it'd better handle this case. And this is why get_cpu()
is used in the non-RPS #ifdef branch. If tree RCU is selected,
rcu_read_lock() won't disable preemption, so preempt_disable() should be
called explictly.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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