linux-kernel - [PATCH 32/36] ipc,rcu: convert call_rcu(ipc_immediate_free) to kfree

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Message-ID: <4D82DB80.6080103@cn.fujitsu.com>
Date:	Fri, 18 Mar 2011 12:11:44 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	WANG Cong <xiyou.wangcong@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 32/36] ipc,rcu: convert call_rcu(ipc_immediate_free) to kfree_rcu()



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

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
---
 ipc/util.c |   16 +---------------
 1 files changed, 1 insertions(+), 15 deletions(-)

diff --git a/ipc/util.c b/ipc/util.c
index 69a0cc1..e6fb418 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -576,19 +576,6 @@ static void ipc_schedule_free(struct rcu_head *head)
 	schedule_work(&sched->work);
 }
 
-/**
- * ipc_immediate_free - free ipc + rcu space
- * @head: RCU callback structure that contains pointer to be freed
- *
- * Free from the RCU callback context.
- */
-static void ipc_immediate_free(struct rcu_head *head)
-{
-	struct ipc_rcu_grace *free =
-		container_of(head, struct ipc_rcu_grace, rcu);
-	kfree(free);
-}
-
 void ipc_rcu_putref(void *ptr)
 {
 	if (--container_of(ptr, struct ipc_rcu_hdr, data)->refcount > 0)
@@ -598,8 +585,7 @@ void ipc_rcu_putref(void *ptr)
 		call_rcu(&container_of(ptr, struct ipc_rcu_grace, data)->rcu,
 				ipc_schedule_free);
 	} else {
-		call_rcu(&container_of(ptr, struct ipc_rcu_grace, data)->rcu,
-				ipc_immediate_free);
+		kfree_rcu(container_of(ptr, struct ipc_rcu_grace, data), rcu);
 	}
 }
 
-- 
1.7.4
--
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