ipv4: fib: Convert FIB notification chain to be atomic
In order not to hold RTNL for long periods of time we're going to dump the FIB tables using RCU. Convert the FIB notification chain to be atomic, as we can't block in RCU critical sections. Signed-off-by: NIdo Schimmel <idosch@mellanox.com> Signed-off-by: NJiri Pirko <jiri@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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