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This solves a potential race problem during the cleanup process. The issue is that addrconf_ifdown() needs to traverse address list, but then drop lock to call the notifier. The version in -next could get confused if add/delete happened during this window. Original code (2.6.32 and earlier) was okay because all addresses were always deleted. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>