From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Fri, 18 Mar 2011 04:05:22 +0000 (+0800)
Subject: security,rcu: Convert call_rcu(sel_netnode_free) to kfree_rcu()
X-Git-Tag: next-20110811~12^2~47
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7978d30c3f4537682555436e8bb5855f5f5b1f26;p=karo-tx-linux.git

security,rcu: Convert call_rcu(sel_netnode_free) to kfree_rcu()

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

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: James Morris <jmorris@namei.org>
Cc: Eric Paris <eparis@parisplace.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
---

diff --git a/security/selinux/netnode.c b/security/selinux/netnode.c
index 3618251d0fdb..8b691a863186 100644
--- a/security/selinux/netnode.c
+++ b/security/selinux/netnode.c
@@ -68,22 +68,6 @@ static LIST_HEAD(sel_netnode_list);
 static DEFINE_SPINLOCK(sel_netnode_lock);
 static struct sel_netnode_bkt sel_netnode_hash[SEL_NETNODE_HASH_SIZE];
 
-/**
- * sel_netnode_free - Frees a node 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 node entry can be
- * released safely.
- *
- */
-static void sel_netnode_free(struct rcu_head *p)
-{
-	struct sel_netnode *node = container_of(p, struct sel_netnode, rcu);
-	kfree(node);
-}
-
 /**
  * sel_netnode_hashfn_ipv4 - IPv4 hashing function for the node table
  * @addr: IPv4 address
@@ -193,7 +177,7 @@ static void sel_netnode_insert(struct sel_netnode *node)
 			rcu_dereference(sel_netnode_hash[idx].list.prev),
 			struct sel_netnode, list);
 		list_del_rcu(&tail->list);
-		call_rcu(&tail->rcu, sel_netnode_free);
+		kfree_rcu(tail, rcu);
 	} else
 		sel_netnode_hash[idx].size++;
 }
@@ -306,7 +290,7 @@ static void sel_netnode_flush(void)
 		list_for_each_entry_safe(node, node_tmp,
 					 &sel_netnode_hash[idx].list, list) {
 				list_del_rcu(&node->list);
-				call_rcu(&node->rcu, sel_netnode_free);
+				kfree_rcu(node, rcu);
 		}
 		sel_netnode_hash[idx].size = 0;
 	}