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The RCU callback xt_rateest_free_rcu() just calls kfree(), so we can use kfree_rcu() instead of call_rcu(). This also allows us to dispense with an rcu_barrier() call, speeding up unloading of this module. Signed-off-by: Paul E. McKenney <[email protected]> Cc: Patrick McHardy <[email protected]> Reviewed-by: Josh Triplett <[email protected]>