[Cluster-devel] [PATCH dlm/next 4/6] fs: dlm: release connection with call_rcu

[Alexander Aring <aahringo@redhat.com>]

This patch will introduce to use call_rcu() for a connection structure
which will call do a deep-free of fields of the connection structure.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
---
 fs/dlm/lowcomms.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 24f5e55313d83..72764e6c9417f 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1603,18 +1603,23 @@ static void shutdown_conn(struct connection *con)
 		con->shutdown_action(con);
 }
 
+static void connection_release(struct rcu_head *rcu)
+{
+	struct connection *con = container_of(rcu, struct connection, rcu);
+
+	clean_one_writequeue(con);
+	kfree(con);
+}
+
 static void free_conn(struct connection *con)
 {
 	close_connection(con, true, true, true);
 	spin_lock(&connections_lock);
 	hlist_del_rcu(&con->list);
 	spin_unlock(&connections_lock);
-	if (con->othercon) {
-		clean_one_writequeue(con->othercon);
-		kfree_rcu(con->othercon, rcu);
-	}
-	clean_one_writequeue(con);
-	kfree_rcu(con, rcu);
+	if (con->othercon)
+		call_rcu(&con->othercon->rcu, connection_release);
+	call_rcu(&con->rcu, connection_release);
 }
 
 static void work_flush(void)
-- 
2.26.2