linux-kernel - [PATCH tip/core/rcu 57/86] net,rcu: convert call_rcu(rps_map_release) to kfree

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Message-Id: <1304256126-26015-57-git-send-email-paulmck@linux.vnet.ibm.com>
Date:	Sun,  1 May 2011 06:21:37 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca,
	josh@...htriplett.org, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com, eric.dumazet@...il.com, darren@...art.com,
	patches@...aro.org, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 57/86] net,rcu: convert call_rcu(rps_map_release) to kfree_rcu()

From: Lai Jiangshan <laijs@...fujitsu.com>

The rcu callback rps_map_release() just calls a kfree(),
so we use kfree_rcu() instead of the call_rcu(rps_map_release).

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
Acked-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
 net/core/net-sysfs.c |   11 ++---------
 1 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 5ceb257..c410f28 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -565,13 +565,6 @@ static ssize_t show_rps_map(struct netdev_rx_queue *queue,
 	return len;
 }
 
-static void rps_map_release(struct rcu_head *rcu)
-{
-	struct rps_map *map = container_of(rcu, struct rps_map, rcu);
-
-	kfree(map);
-}
-
 static ssize_t store_rps_map(struct netdev_rx_queue *queue,
 		      struct rx_queue_attribute *attribute,
 		      const char *buf, size_t len)
@@ -619,7 +612,7 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue,
 	spin_unlock(&rps_map_lock);
 
 	if (old_map)
-		call_rcu(&old_map->rcu, rps_map_release);
+		kfree_rcu(old_map, rcu);
 
 	free_cpumask_var(mask);
 	return len;
@@ -728,7 +721,7 @@ static void rx_queue_release(struct kobject *kobj)
 	map = rcu_dereference_raw(queue->rps_map);
 	if (map) {
 		RCU_INIT_POINTER(queue->rps_map, NULL);
-		call_rcu(&map->rcu, rps_map_release);
+		kfree_rcu(map, rcu);
 	}
 
 	flow_table = rcu_dereference_raw(queue->rps_flow_table);
-- 
1.7.3.2

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