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authorYing Xue <ying.xue@windriver.com>2014-12-02 15:00:30 +0800
committerDavid S. Miller <davem@davemloft.net>2014-12-08 20:39:57 -0500
commit97ede29e80eead50d8bd533cf163401b88c027be (patch)
treec85f9f4af8b3e830847be0de35048bbd92218147 /net/tipc/name_table.h
parent834caafa3e61f63805738376fa9c02dc0c1eb224 (diff)
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tipc: convert name table read-write lock to RCU
Convert tipc name table read-write lock to RCU. After this change, a new spin lock is used to protect name table on write side while RCU is applied on read side. Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Tested-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/name_table.h')
-rw-r--r--net/tipc/name_table.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/tipc/name_table.h b/net/tipc/name_table.h
index c1fd734eb0d5..5f0dee92010d 100644
--- a/net/tipc/name_table.h
+++ b/net/tipc/name_table.h
@@ -62,6 +62,7 @@ struct tipc_port_list;
* @node_list: adjacent matching name seq publications with >= node scope
* @cluster_list: adjacent matching name seq publications with >= cluster scope
* @zone_list: adjacent matching name seq publications with >= zone scope
+ * @rcu: RCU callback head used for deferred freeing
*
* Note that the node list, cluster list, and zone list are circular lists.
*/
@@ -79,6 +80,7 @@ struct publication {
struct list_head node_list;
struct list_head cluster_list;
struct list_head zone_list;
+ struct rcu_head rcu;
};
/**
@@ -93,7 +95,7 @@ struct name_table {
u32 local_publ_count;
};
-extern rwlock_t tipc_nametbl_lock;
+extern spinlock_t tipc_nametbl_lock;
extern struct name_table *tipc_nametbl;
int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb);