net/netfilter: Replace rcu_swap_protected() with rcu_replace_pointer()

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 <[email protected]>
[ paulmck: From rcu_replace() to rcu_replace_pointer() per Ingo Molnar. ]
Signed-off-by: Paul E. McKenney <[email protected]>
Acked-by: Pablo Neira Ayuso <[email protected]>
Cc: Jozsef Kadlecsik <[email protected]>
Cc: Florian Westphal <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>

Author: paulmckrcu

net/netfilter/nf_tables_api.c

@@ -1461,8 +1461,9 @@ static void nft_chain_stats_replace(struct nft_trans *trans)
 	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);