linux-kernel - [PATCH tip/core/rcu 53/86] net,rcu: convert call_rcu(free_dm_hw_stat) to kfree

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Date:	Sun,  1 May 2011 06:21:33 -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 53/86] net,rcu: convert call_rcu(free_dm_hw_stat) to kfree_rcu()

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

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

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
Acked-by: Neil Horman <nhorman@...driver.com>
Acked-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
 net/core/drop_monitor.c |   12 ++----------
 1 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c
index 706502f..7f36b38 100644
--- a/net/core/drop_monitor.c
+++ b/net/core/drop_monitor.c
@@ -207,14 +207,6 @@ static void trace_napi_poll_hit(void *ignore, struct napi_struct *napi)
 	rcu_read_unlock();
 }
 
-
-static void free_dm_hw_stat(struct rcu_head *head)
-{
-	struct dm_hw_stat_delta *n;
-	n = container_of(head, struct dm_hw_stat_delta, rcu);
-	kfree(n);
-}
-
 static int set_all_monitor_traces(int state)
 {
 	int rc = 0;
@@ -245,7 +237,7 @@ static int set_all_monitor_traces(int state)
 		list_for_each_entry_safe(new_stat, temp, &hw_stats_list, list) {
 			if (new_stat->dev == NULL) {
 				list_del_rcu(&new_stat->list);
-				call_rcu(&new_stat->rcu, free_dm_hw_stat);
+				kfree_rcu(new_stat, rcu);
 			}
 		}
 		break;
@@ -314,7 +306,7 @@ static int dropmon_net_event(struct notifier_block *ev_block,
 				new_stat->dev = NULL;
 				if (trace_state == TRACE_OFF) {
 					list_del_rcu(&new_stat->list);
-					call_rcu(&new_stat->rcu, free_dm_hw_stat);
+					kfree_rcu(new_stat, rcu);
 					break;
 				}
 			}
-- 
1.7.3.2

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