From patchwork Sun Nov 11 19:44:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Paul E. McKenney" X-Patchwork-Id: 996171 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 42tPY751Mqz9s9h for ; Mon, 12 Nov 2018 06:47:07 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727276AbeKLFdr (ORCPT ); Mon, 12 Nov 2018 00:33:47 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:38610 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727004AbeKLFdq (ORCPT ); Mon, 12 Nov 2018 00:33:46 -0500 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wABJiIAX049427 for ; Sun, 11 Nov 2018 14:44:20 -0500 Received: from e11.ny.us.ibm.com (e11.ny.us.ibm.com [129.33.205.201]) by mx0b-001b2d01.pphosted.com with ESMTP id 2npd3ut91w-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sun, 11 Nov 2018 14:44:19 -0500 Received: from localhost by e11.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Sun, 11 Nov 2018 19:44:13 -0000 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id wABJiCWv36569178 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Sun, 11 Nov 2018 19:44:12 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8FEE0B205F; Sun, 11 Nov 2018 19:44:12 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6264CB206E; Sun, 11 Nov 2018 19:44:12 +0000 (GMT) Received: from paulmck-ThinkPad-W541 (unknown [9.85.207.24]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP; Sun, 11 Nov 2018 19:44:12 +0000 (GMT) Received: by paulmck-ThinkPad-W541 (Postfix, from userid 1000) id 3A27516C5DB4; Sun, 11 Nov 2018 11:44:13 -0800 (PST) From: "Paul E. McKenney" 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" , Roopa Prabhu , Nikolay Aleksandrov , "David S. Miller" , bridge@lists.linux-foundation.org, netdev@vger.kernel.org Subject: [PATCH tip/core/rcu 33/41] net/bridge: Replace call_rcu_bh() and rcu_barrier_bh() Date: Sun, 11 Nov 2018 11:44:02 -0800 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181111194104.GA4787@linux.ibm.com> References: <20181111194104.GA4787@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18111119-2213-0000-0000-00000315A7E8 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010028; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000270; SDB=6.01116019; UDB=6.00578733; IPR=6.00896120; MB=3.00024114; MTD=3.00000008; XFM=3.00000015; UTC=2018-11-11 19:44:18 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18111119-2214-0000-0000-00005C386BB9 Message-Id: <20181111194410.6368-33-paulmck@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-11-11_13:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=3 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=866 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1811110188 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org 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, rcu_barrier() can be used in place of rcu_barrier_bh(). This commit therefore makes these changes. Signed-off-by: Paul E. McKenney Cc: Roopa Prabhu Cc: Nikolay Aleksandrov Cc: "David S. Miller" Cc: Cc: Acked-by: Nikolay Aleksandrov --- net/bridge/br_mdb.c | 2 +- net/bridge/br_multicast.c | 14 +++++++------- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c index a7ea2d431714..596ec6e7df11 100644 --- a/net/bridge/br_mdb.c +++ b/net/bridge/br_mdb.c @@ -728,7 +728,7 @@ static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry) rcu_assign_pointer(*pp, p->next); hlist_del_init(&p->mglist); del_timer(&p->timer); - call_rcu_bh(&p->rcu, br_multicast_free_pg); + call_rcu(&p->rcu, br_multicast_free_pg); err = 0; if (!mp->ports && !mp->host_joined && diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 6bac0d6b7b94..0255223f2001 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -260,7 +260,7 @@ static void br_multicast_group_expired(struct timer_list *t) hlist_del_rcu(&mp->hlist[mdb->ver]); mdb->size--; - call_rcu_bh(&mp->rcu, br_multicast_free_group); + call_rcu(&mp->rcu, br_multicast_free_group); out: spin_unlock(&br->multicast_lock); @@ -291,7 +291,7 @@ static void br_multicast_del_pg(struct net_bridge *br, del_timer(&p->timer); br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB, p->flags); - call_rcu_bh(&p->rcu, br_multicast_free_pg); + call_rcu(&p->rcu, br_multicast_free_pg); if (!mp->ports && !mp->host_joined && netif_running(br->dev)) @@ -358,7 +358,7 @@ static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu **mdbp, int max, } br_mdb_rehash_seq++; - call_rcu_bh(&mdb->rcu, br_mdb_free); + call_rcu(&mdb->rcu, br_mdb_free); out: rcu_assign_pointer(*mdbp, mdb); @@ -1629,7 +1629,7 @@ br_multicast_leave_group(struct net_bridge *br, rcu_assign_pointer(*pp, p->next); hlist_del_init(&p->mglist); del_timer(&p->timer); - call_rcu_bh(&p->rcu, br_multicast_free_pg); + call_rcu(&p->rcu, br_multicast_free_pg); br_mdb_notify(br->dev, port, group, RTM_DELMDB, p->flags); @@ -2051,19 +2051,19 @@ void br_multicast_dev_del(struct net_bridge *br) hlist_for_each_entry_safe(mp, n, &mdb->mhash[i], hlist[ver]) { del_timer(&mp->timer); - call_rcu_bh(&mp->rcu, br_multicast_free_group); + call_rcu(&mp->rcu, br_multicast_free_group); } } if (mdb->old) { spin_unlock_bh(&br->multicast_lock); - rcu_barrier_bh(); + rcu_barrier(); spin_lock_bh(&br->multicast_lock); WARN_ON(mdb->old); } mdb->old = mdb; - call_rcu_bh(&mdb->rcu, br_mdb_free); + call_rcu(&mdb->rcu, br_mdb_free); out: spin_unlock_bh(&br->multicast_lock);