From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 15 Nov 2011 04:12:55 +0000 (+0000)
Subject: net: use jump_label for netstamp_needed
X-Git-Tag: v3.3-rc1~182^2~586
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=588f033075d8c7efe28695402114eab3f9da47c4;p=pandora-kernel.git

net: use jump_label for netstamp_needed

netstamp_needed seems a good candidate to jump_label conversion.

This avoids 3 conditional branches per incoming packet in fast path.

No measurable difference, given that these conditional branches are
predicted on modern cpus. Only a small icache reduction, thanks to the
unlikely() stuff.

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