From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,URIBL_SBL,URIBL_SBL_A,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2745CA9EB9 for ; Tue, 22 Oct 2019 19:12:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6BABF21783 for ; Tue, 22 Oct 2019 19:12:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571771562; bh=BnXkAL/7cK+RjhC1wxfWjqK/jHr+B2vQlC+ia6JjZ5o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=cJXZBM6dEnMJYe1LLn+5j15pCj8IqmxVTAisL98oNsCmmxKK2LjK8KYlVtYsI5PzB rnofZ1v/ApWOsIv4nJcRSMeZLGnd62IkufpYELDB0aGPtD1kTAQ5i4mR8jSeN7ya1E m/8ogrIGVhXlkdtNJExlQvznYoSAQfPDdLytUPUA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388690AbfJVTMl (ORCPT ); Tue, 22 Oct 2019 15:12:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:43824 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733058AbfJVTMi (ORCPT ); Tue, 22 Oct 2019 15:12:38 -0400 Received: from localhost.localdomain (rrcs-50-75-166-42.nys.biz.rr.com [50.75.166.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EF61821D7E; Tue, 22 Oct 2019 19:12:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571771556; bh=BnXkAL/7cK+RjhC1wxfWjqK/jHr+B2vQlC+ia6JjZ5o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aD1kiIcq87fmMJN//fdM6vfMja4zeuhola2t+Ghzos0/j85ZCBzYZ2p+LRZKpgzQl DE2QTvEaCOo/z1eJIlCYB6BVjDICl2xqPMef0aTP3MkNcI0y6lSxsNjnX9l+79eVro KRQSBgMDPyudyDhZB2USRhde5gyXxmx3EhbCLl4s= From: paulmck@kernel.org To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, 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" , Jamal Hadi Salim , Cong Wang , Jiri Pirko , "David S. Miller" , netdev@vger.kernel.org Subject: [PATCH tip/core/rcu 09/10] net/sched: Replace rcu_swap_protected() with rcu_replace() Date: Tue, 22 Oct 2019 12:12:14 -0700 Message-Id: <20191022191215.25781-9-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20191022191136.GA25627@paulmck-ThinkPad-P72> References: <20191022191136.GA25627@paulmck-ThinkPad-P72> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Paul E. McKenney" This commit replaces the use of rcu_swap_protected() with the more intuitively appealing rcu_replace() 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 [ paulmck: From rcu_replace() to rcu_replace_pointer() per Ingo Molnar. ] Signed-off-by: Paul E. McKenney Cc: Jamal Hadi Salim Cc: Cong Wang Cc: Jiri Pirko Cc: "David S. Miller" Cc: Cc: --- net/sched/act_api.c | 2 +- net/sched/act_csum.c | 4 ++-- net/sched/act_ct.c | 3 ++- net/sched/act_ctinfo.c | 4 ++-- net/sched/act_ife.c | 2 +- net/sched/act_mirred.c | 4 ++-- net/sched/act_mpls.c | 2 +- net/sched/act_police.c | 6 +++--- net/sched/act_sample.c | 4 ++-- net/sched/act_skbedit.c | 4 ++-- net/sched/act_tunnel_key.c | 4 ++-- net/sched/act_vlan.c | 2 +- 12 files changed, 21 insertions(+), 20 deletions(-) diff --git a/net/sched/act_api.c b/net/sched/act_api.c index 2558f00..3d51573 100644 --- a/net/sched/act_api.c +++ b/net/sched/act_api.c @@ -88,7 +88,7 @@ struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action, struct tcf_chain *goto_chain) { a->tcfa_action = action; - rcu_swap_protected(a->goto_chain, goto_chain, 1); + goto_chain = rcu_replace_pointer(a->goto_chain, goto_chain, 1); return goto_chain; } EXPORT_SYMBOL(tcf_action_set_ctrlact); diff --git a/net/sched/act_csum.c b/net/sched/act_csum.c index d3cfad8..87dddba 100644 --- a/net/sched/act_csum.c +++ b/net/sched/act_csum.c @@ -101,8 +101,8 @@ static int tcf_csum_init(struct net *net, struct nlattr *nla, spin_lock_bh(&p->tcf_lock); goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); - rcu_swap_protected(p->params, params_new, - lockdep_is_held(&p->tcf_lock)); + params_new = rcu_replace_pointer(p->params, params_new, + lockdep_is_held(&p->tcf_lock)); spin_unlock_bh(&p->tcf_lock); if (goto_ch) diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c index fcc4602..2d5ab23 100644 --- a/net/sched/act_ct.c +++ b/net/sched/act_ct.c @@ -722,7 +722,8 @@ static int tcf_ct_init(struct net *net, struct nlattr *nla, spin_lock_bh(&c->tcf_lock); goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); - rcu_swap_protected(c->params, params, lockdep_is_held(&c->tcf_lock)); + params = rcu_replace_pointer(c->params, params, + lockdep_is_held(&c->tcf_lock)); spin_unlock_bh(&c->tcf_lock); if (goto_ch) diff --git a/net/sched/act_ctinfo.c b/net/sched/act_ctinfo.c index 0dbcfd1..c599818 100644 --- a/net/sched/act_ctinfo.c +++ b/net/sched/act_ctinfo.c @@ -257,8 +257,8 @@ static int tcf_ctinfo_init(struct net *net, struct nlattr *nla, spin_lock_bh(&ci->tcf_lock); goto_ch = tcf_action_set_ctrlact(*a, actparm->action, goto_ch); - rcu_swap_protected(ci->params, cp_new, - lockdep_is_held(&ci->tcf_lock)); + cp_new = rcu_replace_pointer(ci->params, cp_new, + lockdep_is_held(&ci->tcf_lock)); spin_unlock_bh(&ci->tcf_lock); if (goto_ch) diff --git a/net/sched/act_ife.c b/net/sched/act_ife.c index 3a31e24..2ea2e16 100644 --- a/net/sched/act_ife.c +++ b/net/sched/act_ife.c @@ -594,7 +594,7 @@ static int tcf_ife_init(struct net *net, struct nlattr *nla, spin_lock_bh(&ife->tcf_lock); /* protected by tcf_lock when modifying existing action */ goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); - rcu_swap_protected(ife->params, p, 1); + p = rcu_replace_pointer(ife->params, p, 1); if (exists) spin_unlock_bh(&ife->tcf_lock); diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c index 9ce073a..0c2f737 100644 --- a/net/sched/act_mirred.c +++ b/net/sched/act_mirred.c @@ -178,8 +178,8 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla, goto put_chain; } mac_header_xmit = dev_is_mac_header_xmit(dev); - rcu_swap_protected(m->tcfm_dev, dev, - lockdep_is_held(&m->tcf_lock)); + dev = rcu_replace_pointer(m->tcfm_dev, dev, + lockdep_is_held(&m->tcf_lock)); if (dev) dev_put(dev); m->tcfm_mac_header_xmit = mac_header_xmit; diff --git a/net/sched/act_mpls.c b/net/sched/act_mpls.c index e168df0..5b3031c 100644 --- a/net/sched/act_mpls.c +++ b/net/sched/act_mpls.c @@ -258,7 +258,7 @@ static int tcf_mpls_init(struct net *net, struct nlattr *nla, spin_lock_bh(&m->tcf_lock); goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); - rcu_swap_protected(m->mpls_p, p, lockdep_is_held(&m->tcf_lock)); + p = rcu_replace_pointer(m->mpls_p, p, lockdep_is_held(&m->tcf_lock)); spin_unlock_bh(&m->tcf_lock); if (goto_ch) diff --git a/net/sched/act_police.c b/net/sched/act_police.c index 89c04c5..caa91cf 100644 --- a/net/sched/act_police.c +++ b/net/sched/act_police.c @@ -191,9 +191,9 @@ static int tcf_police_init(struct net *net, struct nlattr *nla, police->tcfp_ptoks = new->tcfp_mtu_ptoks; spin_unlock_bh(&police->tcfp_lock); goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); - rcu_swap_protected(police->params, - new, - lockdep_is_held(&police->tcf_lock)); + new = rcu_replace_pointer(police->params, + new, + lockdep_is_held(&police->tcf_lock)); spin_unlock_bh(&police->tcf_lock); if (goto_ch) diff --git a/net/sched/act_sample.c b/net/sched/act_sample.c index 514456a..4deeaf2 100644 --- a/net/sched/act_sample.c +++ b/net/sched/act_sample.c @@ -102,8 +102,8 @@ static int tcf_sample_init(struct net *net, struct nlattr *nla, goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); s->rate = rate; s->psample_group_num = psample_group_num; - rcu_swap_protected(s->psample_group, psample_group, - lockdep_is_held(&s->tcf_lock)); + psample_group = rcu_replace_pointer(s->psample_group, psample_group, + lockdep_is_held(&s->tcf_lock)); if (tb[TCA_SAMPLE_TRUNC_SIZE]) { s->truncate = true; diff --git a/net/sched/act_skbedit.c b/net/sched/act_skbedit.c index 6a8d333..c38cc39 100644 --- a/net/sched/act_skbedit.c +++ b/net/sched/act_skbedit.c @@ -206,8 +206,8 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla, spin_lock_bh(&d->tcf_lock); goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); - rcu_swap_protected(d->params, params_new, - lockdep_is_held(&d->tcf_lock)); + params_new = rcu_replace_pointer(d->params, params_new, + lockdep_is_held(&d->tcf_lock)); spin_unlock_bh(&d->tcf_lock); if (params_new) kfree_rcu(params_new, rcu); diff --git a/net/sched/act_tunnel_key.c b/net/sched/act_tunnel_key.c index 2f83a79..20d7ca4 100644 --- a/net/sched/act_tunnel_key.c +++ b/net/sched/act_tunnel_key.c @@ -381,8 +381,8 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla, spin_lock_bh(&t->tcf_lock); goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); - rcu_swap_protected(t->params, params_new, - lockdep_is_held(&t->tcf_lock)); + params_new = rcu_replace_pointer(t->params, params_new, + lockdep_is_held(&t->tcf_lock)); spin_unlock_bh(&t->tcf_lock); tunnel_key_release_params(params_new); if (goto_ch) diff --git a/net/sched/act_vlan.c b/net/sched/act_vlan.c index 08aaf71..7aca1f0 100644 --- a/net/sched/act_vlan.c +++ b/net/sched/act_vlan.c @@ -220,7 +220,7 @@ static int tcf_vlan_init(struct net *net, struct nlattr *nla, spin_lock_bh(&v->tcf_lock); goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); - rcu_swap_protected(v->vlan_p, p, lockdep_is_held(&v->tcf_lock)); + p = rcu_replace_pointer(v->vlan_p, p, lockdep_is_held(&v->tcf_lock)); spin_unlock_bh(&v->tcf_lock); if (goto_ch) -- 2.9.5