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net,rcu: Convert call_rcu(xt_rateest_free_rcu) to kfree_rcu() 

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 <paulmck@linux.vnet.ibm.com>
Cc: Patrick McHardy <kaber@trash.net>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
Paul E. McKenney 2011-05-02 01:00:18 -07:00
parent a95cded32d
commit cefcb60201
1 changed files with 1 additions and 7 deletions
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8
net/netfilter/xt_RATEEST.c
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@ -60,11 +60,6 @@ struct xt_rateest *xt_rateest_lookup(const char *name)
} }
EXPORT_SYMBOL_GPL(xt_rateest_lookup); EXPORT_SYMBOL_GPL(xt_rateest_lookup);
static void xt_rateest_free_rcu(struct rcu_head *head)
{
kfree(container_of(head, struct xt_rateest, rcu));
}
void xt_rateest_put(struct xt_rateest *est) void xt_rateest_put(struct xt_rateest *est)
{ {
mutex_lock(&xt_rateest_mutex); mutex_lock(&xt_rateest_mutex);
@ -75,7 +70,7 @@ void xt_rateest_put(struct xt_rateest *est)
* gen_estimator est_timer() might access est->lock or bstats, * gen_estimator est_timer() might access est->lock or bstats,
* wait a RCU grace period before freeing 'est' * wait a RCU grace period before freeing 'est'
*/ */
call_rcu(&est->rcu, xt_rateest_free_rcu); kfree_rcu(est, rcu);
} }
mutex_unlock(&xt_rateest_mutex); mutex_unlock(&xt_rateest_mutex);
} }
@ -188,7 +183,6 @@ static int __init xt_rateest_tg_init(void)
static void __exit xt_rateest_tg_fini(void) static void __exit xt_rateest_tg_fini(void)
{ {
xt_unregister_target(&xt_rateest_tg_reg); xt_unregister_target(&xt_rateest_tg_reg);
rcu_barrier(); /* Wait for completion of call_rcu()'s (xt_rateest_free_rcu) */
} }