From: David S. Miller <davem@davemloft.net>
Date: Fri, 25 Mar 2011 00:42:21 +0000 (-0700)
Subject: ipv4: Invalidate nexthop cache nh_saddr more correctly.
X-Git-Tag: v2.6.39-rc1~54^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=436c3b66ec9824a633724ae42de1c416af4f2063;p=pandora-kernel.git

ipv4: Invalidate nexthop cache nh_saddr more correctly.

Any operation that:

1) Brings up an interface
2) Adds an IP address to an interface
3) Deletes an IP address from an interface

can potentially invalidate the nh_saddr value, requiring
it to be recomputed.

Perform the recomputation lazily using a generation ID.

Reported-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
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