linux-kernel - [PATCH] mlxsw: core: Switch to kvfree

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Message-Id: <20211215111845.2514-7-urezki@gmail.com>
Date:   Wed, 15 Dec 2021 12:18:43 +0100
From:   "Uladzislau Rezki (Sony)" <urezki@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>, RCU <rcu@...r.kernel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>
Cc:     Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Daniel Axtens <dja@...ens.net>,
        Frederic Weisbecker <frederic@...nel.org>,
        Neeraj Upadhyay <neeraju@...eaurora.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Theodore Y . Ts'o" <tytso@....edu>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Uladzislau Rezki <urezki@...il.com>,
        Oleksiy Avramchenko <oleksiy.avramchenko@...ymobile.com>
Subject: [PATCH] mlxsw: core: Switch to kvfree_rcu() API

Instead of invoking a synchronize_rcu() to free a pointer
after a grace period we can directly make use of new API
that does the same but in more efficient way.

TO: David S. Miller <davem@...emloft.net>
TO: Jakub Kicinski <kuba@...nel.org>
TO: netdev@...r.kernel.org
Signed-off-by: Uladzislau Rezki (Sony) <urezki@...il.com>
---
 drivers/net/ethernet/mellanox/mlxsw/core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 3fd3812b8f31..47c29769759b 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -2190,8 +2190,7 @@ void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core,
 	if (!rxl_item)
 		return;
 	list_del_rcu(&rxl_item->list);
-	synchronize_rcu();
-	kfree(rxl_item);
+	kvfree_rcu(rxl_item);
 }
 EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister);
 
-- 
2.30.2