linux-kernel - [PATCH rcu 01/10] rcu: Use hlist_nulls_next_rcu() in hlist_nulls_add_tail

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Message-Id: <20230105002305.1768591-1-paulmck@kernel.org>
Date:   Wed,  4 Jan 2023 16:22:56 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...a.com,
        rostedt@...dmis.org, Zhao Mengmeng <zhaomengmeng@...inos.cn>,
        "Paul E . McKenney" <paulmck@...nel.org>
Subject: [PATCH rcu 01/10] rcu: Use hlist_nulls_next_rcu() in hlist_nulls_add_tail_rcu()

From: Zhao Mengmeng <zhaomengmeng@...inos.cn>

In commit 8dbd76e79a16 ("tcp/dccp: fix possible race
__inet_lookup_established()"), function hlist_nulls_add_tail_rcu() was
added back, but the local variable *last* is of type hlist_nulls_node,
so use hlist_nulls_next_rcu() instead of hlist_next_rcu().

Signed-off-by: Zhao Mengmeng <zhaomengmeng@...inos.cn>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 include/linux/rculist_nulls.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/rculist_nulls.h b/include/linux/rculist_nulls.h
index d8afdb8784c1c..ba4c00dd8005a 100644
--- a/include/linux/rculist_nulls.h
+++ b/include/linux/rculist_nulls.h
@@ -139,7 +139,7 @@ static inline void hlist_nulls_add_tail_rcu(struct hlist_nulls_node *n,
 	if (last) {
 		n->next = last->next;
 		n->pprev = &last->next;
-		rcu_assign_pointer(hlist_next_rcu(last), n);
+		rcu_assign_pointer(hlist_nulls_next_rcu(last), n);
 	} else {
 		hlist_nulls_add_head_rcu(n, h);
 	}
-- 
2.31.1.189.g2e36527f23