netdev - [tip: core/rcu] net/tipc: Replace rcu_swap_protected() with rcu_replace

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Date:   Sat, 25 Jan 2020 10:42:48 -0000
From:   "tip-bot2 for Paul E. McKenney" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        kbuild test robot <lkp@...el.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Jon Maloy <jon.maloy@...csson.com>,
        Ying Xue <ying.xue@...driver.com>,
        "David S. Miller" <davem@...emloft.net>, <netdev@...r.kernel.org>,
        <tipc-discussion@...ts.sourceforge.net>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: core/rcu] net/tipc: Replace rcu_swap_protected() with
 rcu_replace_pointer()

The following commit has been merged into the core/rcu branch of tip:

Commit-ID:     1a271ebbfe33a44f61e02d35a2950ab00b32850b
Gitweb:        https://git.kernel.org/tip/1a271ebbfe33a44f61e02d35a2950ab00b32850b
Author:        Paul E. McKenney <paulmck@...nel.org>
AuthorDate:    Mon, 09 Dec 2019 19:13:45 -08:00
Committer:     Paul E. McKenney <paulmck@...nel.org>
CommitterDate: Thu, 12 Dec 2019 10:19:40 -08:00

net/tipc: 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 <torvalds@...ux-foundation.org>
Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
[ paulmck: Updated based on Ying Xue and Tuong Lien Tong feedback. ]
Cc: Jon Maloy <jon.maloy@...csson.com>
Cc: Ying Xue <ying.xue@...driver.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: <netdev@...r.kernel.org>
Cc: <tipc-discussion@...ts.sourceforge.net>
---
 net/tipc/crypto.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/net/tipc/crypto.c b/net/tipc/crypto.c
index 990a872..c8c47fc 100644
--- a/net/tipc/crypto.c
+++ b/net/tipc/crypto.c
@@ -257,9 +257,6 @@ static char *tipc_key_change_dump(struct tipc_key old, struct tipc_key new,
 #define tipc_aead_rcu_ptr(rcu_ptr, lock)				\
 	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))
-
 #define tipc_aead_rcu_replace(rcu_ptr, ptr, lock)			\
 do {									\
 	typeof(rcu_ptr) __tmp = rcu_dereference_protected((rcu_ptr),	\
@@ -1189,7 +1186,7 @@ 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, lockdep_is_held(&rx->lock));
 		x = (key.passive - key.pending + new_pending) % KEY_MAX;
 		new_passive = (x <= 0) ? x + KEY_MAX : x;
 	}