add an empty list check, so we can get rid of some useless
list iterate or spin locks.
Signed-off-by: Chen Hanxiao <chenhx.fnst@xxxxxxxxxxx>
---
net/sunrpc/clnt.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 28f3749f6dc6..749317587bb3 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -3345,8 +3345,13 @@ void rpc_show_tasks(struct net *net)
int header = 0;
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
+ if (list_empty(&sn->all_clients))
+ return;
+
spin_lock(&sn->rpc_client_lock);
list_for_each_entry(clnt, &sn->all_clients, cl_clients) {
+ if (list_empty(&clnt->cl_tasks))
+ continue;
spin_lock(&clnt->cl_lock);
list_for_each_entry(task, &clnt->cl_tasks, tk_task) {
if (!header) {
--
2.39.1
