linux-kernel - [PATCH 23/36] security,rcu: convert call_rcu(sel_netport_free) to kfree

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Date:	Fri, 18 Mar 2011 12:05:57 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Stephen Smalley <sds@...ho.nsa.gov>,
	James Morris <jmorris@...ei.org>,
	Eric Paris <eparis@...isplace.org>,
	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 23/36] security,rcu: convert call_rcu(sel_netport_free) to
 kfree_rcu()



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

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
---
 security/selinux/netport.c |   20 ++------------------
 1 files changed, 2 insertions(+), 18 deletions(-)

diff --git a/security/selinux/netport.c b/security/selinux/netport.c
index cfe2d72..ae76e29 100644
--- a/security/selinux/netport.c
+++ b/security/selinux/netport.c
@@ -68,22 +68,6 @@ static DEFINE_SPINLOCK(sel_netport_lock);
 static struct sel_netport_bkt sel_netport_hash[SEL_NETPORT_HASH_SIZE];
 
 /**
- * sel_netport_free - Frees a port entry
- * @p: the entry's RCU field
- *
- * Description:
- * This function is designed to be used as a callback to the call_rcu()
- * function so that memory allocated to a hash table port entry can be
- * released safely.
- *
- */
-static void sel_netport_free(struct rcu_head *p)
-{
-	struct sel_netport *port = container_of(p, struct sel_netport, rcu);
-	kfree(port);
-}
-
-/**
  * sel_netport_hashfn - Hashing function for the port table
  * @pnum: port number
  *
@@ -142,7 +126,7 @@ static void sel_netport_insert(struct sel_netport *port)
 			rcu_dereference(sel_netport_hash[idx].list.prev),
 			struct sel_netport, list);
 		list_del_rcu(&tail->list);
-		call_rcu(&tail->rcu, sel_netport_free);
+		kfree_rcu(tail, rcu);
 	} else
 		sel_netport_hash[idx].size++;
 }
@@ -241,7 +225,7 @@ static void sel_netport_flush(void)
 		list_for_each_entry_safe(port, port_tmp,
 					 &sel_netport_hash[idx].list, list) {
 			list_del_rcu(&port->list);
-			call_rcu(&port->rcu, sel_netport_free);
+			kfree_rcu(port, rcu);
 		}
 		sel_netport_hash[idx].size = 0;
 	}
-- 
1.7.4
--
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