From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 6 May 2010 23:51:21 +0000 (+0000)
Subject: rps: avoid one atomic in enqueue_to_backlog
X-Git-Tag: v2.6.35-rc1~473^2~82
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ebda37c27d0c768947e9b058332d7ea798210cf8;p=pandora-kernel.git

rps: avoid one atomic in enqueue_to_backlog

If CONFIG_SMP=y, then we own a queue spinlock, we can avoid the atomic
test_and_set_bit() from napi_schedule_prep().

We now have same number of atomic ops per netif_rx() calls than with
pre-RPS kernel.

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