From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Paul E. McKenney" Subject: [PATCH tip/core/rcu 30/41] netfilter: Replace call_rcu_bh(), rcu_barrier_bh(), and synchronize_rcu_bh() Date: Sun, 11 Nov 2018 11:43:59 -0800 Message-ID: <20181111194410.6368-30-paulmck@linux.ibm.com> References: <20181111194104.GA4787@linux.ibm.com> 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" , Pablo Neira Ayuso , Jozsef Kadlecsik , Florian Westphal , "David S. Miller" , Alexey Kuznetsov , Hideaki YOSHIFUJI , netfilter-devel@vger.kernel.org, coreteam@netfilter.org, netdev@vger.kernel.org To: linux-kernel@vger.kernel.org Return-path: In-Reply-To: <20181111194104.GA4787@linux.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Now that call_rcu()'s callback is not invoked until after 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() and synchronize_rcu() in place of synchronize_rcu_bh(). This commit therefore makes these changes. Signed-off-by: Paul E. McKenney Cc: Pablo Neira Ayuso Cc: Jozsef Kadlecsik Cc: Florian Westphal Cc: "David S. Miller" Cc: Alexey Kuznetsov Cc: Hideaki YOSHIFUJI Cc: Cc: Cc: --- net/ipv4/netfilter/ipt_CLUSTERIP.c | 6 +++--- net/netfilter/ipset/ip_set_hash_gen.h | 4 ++-- net/netfilter/nfnetlink_log.c | 2 +- net/netfilter/xt_hashlimit.c | 4 ++-- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c index 2c8d313ae216..5b0c1ee6ae26 100644 --- a/net/ipv4/netfilter/ipt_CLUSTERIP.c +++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c @@ -94,7 +94,7 @@ static inline void clusterip_config_put(struct clusterip_config *c) { if (refcount_dec_and_test(&c->refcount)) - call_rcu_bh(&c->rcu, clusterip_config_rcu_free); + call_rcu(&c->rcu, clusterip_config_rcu_free); } /* decrease the count of entries using/referencing this config. If last @@ -876,8 +876,8 @@ static void __exit clusterip_tg_exit(void) xt_unregister_target(&clusterip_tg_reg); unregister_pernet_subsys(&clusterip_net_ops); - /* Wait for completion of call_rcu_bh()'s (clusterip_config_rcu_free) */ - rcu_barrier_bh(); + /* Wait for completion of call_rcu()'s (clusterip_config_rcu_free) */ + rcu_barrier(); } module_init(clusterip_tg_init); diff --git a/net/netfilter/ipset/ip_set_hash_gen.h b/net/netfilter/ipset/ip_set_hash_gen.h index e287da68d5fa..2c9609929c71 100644 --- a/net/netfilter/ipset/ip_set_hash_gen.h +++ b/net/netfilter/ipset/ip_set_hash_gen.h @@ -67,7 +67,7 @@ tune_ahash_max(u8 curr, u32 multi) /* A hash bucket */ struct hbucket { - struct rcu_head rcu; /* for call_rcu_bh */ + struct rcu_head rcu; /* for call_rcu */ /* Which positions are used in the array */ DECLARE_BITMAP(used, AHASH_MAX_TUNED); u8 size; /* size of the array */ @@ -664,7 +664,7 @@ mtype_resize(struct ip_set *set, bool retried) spin_unlock_bh(&set->lock); /* Give time to other readers of the set */ - synchronize_rcu_bh(); + synchronize_rcu(); pr_debug("set %s resized from %u (%p) to %u (%p)\n", set->name, orig->htable_bits, orig, t->htable_bits, t); diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c index 332c69d27b47..b1f9c5303f02 100644 --- a/net/netfilter/nfnetlink_log.c +++ b/net/netfilter/nfnetlink_log.c @@ -148,7 +148,7 @@ static void instance_put(struct nfulnl_instance *inst) { if (inst && refcount_dec_and_test(&inst->use)) - call_rcu_bh(&inst->rcu, nfulnl_instance_free_rcu); + call_rcu(&inst->rcu, nfulnl_instance_free_rcu); } static void nfulnl_timer(struct timer_list *t); diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c index 3e7d259e5d8d..8138b68a9a44 100644 --- a/net/netfilter/xt_hashlimit.c +++ b/net/netfilter/xt_hashlimit.c @@ -260,7 +260,7 @@ static inline void dsthash_free(struct xt_hashlimit_htable *ht, struct dsthash_ent *ent) { hlist_del_rcu(&ent->node); - call_rcu_bh(&ent->rcu, dsthash_free_rcu); + call_rcu(&ent->rcu, dsthash_free_rcu); ht->count--; } static void htable_gc(struct work_struct *work); @@ -1329,7 +1329,7 @@ static void __exit hashlimit_mt_exit(void) xt_unregister_matches(hashlimit_mt_reg, ARRAY_SIZE(hashlimit_mt_reg)); unregister_pernet_subsys(&hashlimit_net_ops); - rcu_barrier_bh(); + rcu_barrier(); kmem_cache_destroy(hashlimit_cachep); } -- 2.17.1