[PATCH net/tipc] Replace rcu_swap_protected() with rcu_replace_pointer()

[Paul E. McKenney]

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@xxxxxxxxxxxxxx/
Reported-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
Cc: Jon Maloy <jon.maloy@xxxxxxxxxxxx>
Cc: Ying Xue <ying.xue@xxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: <netdev@xxxxxxxxxxxxxxx>
Cc: <tipc-discussion@xxxxxxxxxxxxxxxxxxxxx>

diff --git a/net/tipc/crypto.c b/net/tipc/crypto.c
index 990a872..64cf831 100644
--- a/net/tipc/crypto.c
+++ b/net/tipc/crypto.c
@@ -258,7 +258,7 @@ static char *tipc_key_change_dump(struct tipc_key old, struct tipc_key new,
 	rcu_dereference_protected((rcu_ptr), lockdep_is_held(lock))
 
 #define tipc_aead_rcu_swap(rcu_ptr, ptr, lock)				\
-	rcu_swap_protected((rcu_ptr), (ptr), lockdep_is_held(lock))
+	rcu_replace_pointer((rcu_ptr), (ptr), lockdep_is_held(lock))
 
 #define tipc_aead_rcu_replace(rcu_ptr, ptr, lock)			\
 do {									\
@@ -1189,7 +1189,7 @@ static bool tipc_crypto_key_try_align(struct tipc_crypto *rx, u8 new_pending)
 
 	/* Move passive key if any */
 	if (key.passive) {
-		tipc_aead_rcu_swap(rx->aead[key.passive], tmp2, &rx->lock);
+		tmp2 = rcu_replace_pointer(rx->aead[key.passive], tmp2, &rx->lock);
 		x = (key.passive - key.pending + new_pending) % KEY_MAX;
 		new_passive = (x <= 0) ? x + KEY_MAX : x;
 	}