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From:   "Paul E. McKenney" <paulmck@linux.ibm.com>
To:     linux-kernel@vger.kernel.org
Cc:     mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com,
        akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
        josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
        rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
        fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org,
        "Paul E. McKenney" <paulmck@linux.ibm.com>,
        "David S. Miller" <davem@davemloft.net>, netdev@vger.kernel.org
Subject: [PATCH tip/core/rcu 32/41] net/core: Replace call_rcu_bh() and synchronize_rcu_bh()
Date:   Sun, 11 Nov 2018 11:44:01 -0800
In-Reply-To: <20181111194104.GA4787@linux.ibm.com>
References: <20181111194104.GA4787@linux.ibm.com>
Message-Id: <20181111194410.6368-32-paulmck@linux.ibm.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Now that call_rcu()'s callback is not invoked until after all bh-disable
regions of code have completed (in addition to explicitly marked
RCU read-side critical sections), call_rcu() can be used in place of
call_rcu_bh().  Similarly, synchronize_rcu() can be used in place of
synchronize_rcu_bh().  This commit therefore makes these changes.

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: <netdev@vger.kernel.org>
---
 net/core/netpoll.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 5da9552b186b..677d3f332172 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -800,7 +800,7 @@ void __netpoll_cleanup(struct netpoll *np)
 			ops->ndo_netpoll_cleanup(np->dev);
 
 		RCU_INIT_POINTER(np->dev->npinfo, NULL);
-		call_rcu_bh(&npinfo->rcu, rcu_cleanup_netpoll_info);
+		call_rcu(&npinfo->rcu, rcu_cleanup_netpoll_info);
 	} else
 		RCU_INIT_POINTER(np->dev->npinfo, NULL);
 }
@@ -811,7 +811,7 @@ void __netpoll_free(struct netpoll *np)
 	ASSERT_RTNL();
 
 	/* Wait for transmitting packets to finish before freeing. */
-	synchronize_rcu_bh();
+	synchronize_rcu();
 	__netpoll_cleanup(np);
 	kfree(np);
 }
-- 
2.17.1