From 83229aa5e2c242163599266a686483e3b91ec07e Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Thu, 31 Mar 2011 04:52:14 -0700
Subject: [PATCH] net: Add helper flowi4_init_output().

On-stack initialization via assignment of flow structures are
expensive because GCC emits a memset() to clear the entire
structure out no matter what.

Add a helper for ipv4 output flow key setup which we can use to avoid
the memset.

Signed-off-by: David S. Miller <davem@davemloft.net>
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