From: "Paul E. McKenney" <paulmck@kernel.org>
Date: Mon, 23 Sep 2019 15:53:02 -0700
Subject: net/netfilter: Replace rcu_swap_protected() with
 rcu_replace_pointer()
Patch-mainline: v5.5-rc1
Git-commit: b685b534bf1586a01b32280d1da39febaf270039
References: bsc#1154353

This commit replaces the use of rcu_swap_protected() with the more
intuitively appealing rcu_replace_pointer() as a step towards removing
rcu_swap_protected().

Link: https://lore.kernel.org/lkml/CAHk-=wiAsJLw1egFEE=Z7-GGtM6wcvtyytXZA1+BHqta4gg6Hw@mail.gmail.com/
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
[ paulmck: From rcu_replace() to rcu_replace_pointer() per Ingo Molnar. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Jozsef Kadlecsik <kadlec@netfilter.org>
Cc: Florian Westphal <fw@strlen.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: <netfilter-devel@vger.kernel.org>
Cc: <coreteam@netfilter.org>
Cc: <netdev@vger.kernel.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 net/netfilter/nf_tables_api.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -1461,8 +1461,9 @@ static void nft_chain_stats_replace(stru
 	if (!nft_trans_chain_stats(trans))
 		return;
 
-	rcu_swap_protected(chain->stats, nft_trans_chain_stats(trans),
-			   lockdep_commit_lock_is_held(trans->ctx.net));
+	nft_trans_chain_stats(trans) =
+		rcu_replace_pointer(chain->stats, nft_trans_chain_stats(trans),
+				    lockdep_commit_lock_is_held(trans->ctx.net));
 
 	if (!nft_trans_chain_stats(trans))
 		static_branch_inc(&nft_counters_enabled);