linux-kernel - [PATCH net-next] net/sched: remove return value of unregister_tcf_proto

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Date:   Mon, 4 Jul 2022 20:43:22 +0800
From:   Zhengchao Shao <shaozhengchao@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <jhs@...atatu.com>, <xiyou.wangcong@...il.com>, <jiri@...nulli.us>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>
CC:     <weiyongjun1@...wei.com>, <yuehaibing@...wei.com>,
        <shaozhengchao@...wei.com>
Subject: [PATCH net-next] net/sched: remove return value of unregister_tcf_proto_ops

Return value of unregister_tcf_proto_ops is useless, remove it.

Signed-off-by: Zhengchao Shao <shaozhengchao@...wei.com>
---
 include/net/pkt_cls.h | 2 +-
 net/sched/cls_api.c   | 6 ++----
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index 8cf001aed858..d9d90e6925e1 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -23,7 +23,7 @@ struct tcf_walker {
 };
 
 int register_tcf_proto_ops(struct tcf_proto_ops *ops);
-int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
+void unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
 
 struct tcf_block_ext_info {
 	enum flow_block_binder_type binder_type;
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 9bb4d3dcc994..fdc9acbd56df 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -194,10 +194,9 @@ EXPORT_SYMBOL(register_tcf_proto_ops);
 
 static struct workqueue_struct *tc_filter_wq;
 
-int unregister_tcf_proto_ops(struct tcf_proto_ops *ops)
+void unregister_tcf_proto_ops(struct tcf_proto_ops *ops)
 {
 	struct tcf_proto_ops *t;
-	int rc = -ENOENT;
 
 	/* Wait for outstanding call_rcu()s, if any, from a
 	 * tcf_proto_ops's destroy() handler.
@@ -209,12 +208,11 @@ int unregister_tcf_proto_ops(struct tcf_proto_ops *ops)
 	list_for_each_entry(t, &tcf_proto_base, head) {
 		if (t == ops) {
 			list_del(&t->head);
-			rc = 0;
 			break;
 		}
 	}
 	write_unlock(&cls_mod_lock);
-	return rc;
+	return;
 }
 EXPORT_SYMBOL(unregister_tcf_proto_ops);
 
-- 
2.17.1