From 3ed18d76d959e5cbfa5d70c8f7ba95476582a556 Mon Sep 17 00:00:00 2001
From: Robert Olsson <robert.olsson@its.uu.se>
Date: Thu, 21 May 2009 15:20:59 -0700
Subject: [PATCH] ipv4: Fix oops with FIB_TRIE

It seems we can fix this by disabling preemption while we re-balance the
trie. This is with the CONFIG_CLASSIC_RCU. It's been stress-tested at high
loads continuesly taking a full BGP table up/down via iproute -batch.

Note. fib_trie is not updated for CONFIG_PREEMPT_RCU

Reported-by: Andrei Popa
Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
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