From a9b3cd7f323b2e57593e7215362a7b02fc933e3a Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Mon, 1 Aug 2011 16:19:00 +0000 Subject: rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER When assigning a NULL value to an RCU protected pointer, no barrier is needed. The rcu_assign_pointer, used to handle that but will soon change to not handle the special case. Convert all rcu_assign_pointer of NULL value. //smpl @@ expression P; @@ - rcu_assign_pointer(P, NULL) + RCU_INIT_POINTER(P, NULL) // Signed-off-by: Stephen Hemminger Acked-by: Paul E. McKenney Signed-off-by: David S. Miller --- net/ipv4/netfilter/nf_nat_core.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) (limited to 'net/ipv4/netfilter/nf_nat_core.c') diff --git a/net/ipv4/netfilter/nf_nat_core.c b/net/ipv4/netfilter/nf_nat_core.c index 3346de5d94d0..447bc5cfdc6c 100644 --- a/net/ipv4/netfilter/nf_nat_core.c +++ b/net/ipv4/netfilter/nf_nat_core.c @@ -514,7 +514,7 @@ int nf_nat_protocol_register(const struct nf_nat_protocol *proto) ret = -EBUSY; goto out; } - rcu_assign_pointer(nf_nat_protos[proto->protonum], proto); + RCU_INIT_POINTER(nf_nat_protos[proto->protonum], proto); out: spin_unlock_bh(&nf_nat_lock); return ret; @@ -525,7 +525,7 @@ EXPORT_SYMBOL(nf_nat_protocol_register); void nf_nat_protocol_unregister(const struct nf_nat_protocol *proto) { spin_lock_bh(&nf_nat_lock); - rcu_assign_pointer(nf_nat_protos[proto->protonum], + RCU_INIT_POINTER(nf_nat_protos[proto->protonum], &nf_nat_unknown_protocol); spin_unlock_bh(&nf_nat_lock); synchronize_rcu(); @@ -736,10 +736,10 @@ static int __init nf_nat_init(void) /* Sew in builtin protocols. */ spin_lock_bh(&nf_nat_lock); for (i = 0; i < MAX_IP_NAT_PROTO; i++) - rcu_assign_pointer(nf_nat_protos[i], &nf_nat_unknown_protocol); - rcu_assign_pointer(nf_nat_protos[IPPROTO_TCP], &nf_nat_protocol_tcp); - rcu_assign_pointer(nf_nat_protos[IPPROTO_UDP], &nf_nat_protocol_udp); - rcu_assign_pointer(nf_nat_protos[IPPROTO_ICMP], &nf_nat_protocol_icmp); + RCU_INIT_POINTER(nf_nat_protos[i], &nf_nat_unknown_protocol); + RCU_INIT_POINTER(nf_nat_protos[IPPROTO_TCP], &nf_nat_protocol_tcp); + RCU_INIT_POINTER(nf_nat_protos[IPPROTO_UDP], &nf_nat_protocol_udp); + RCU_INIT_POINTER(nf_nat_protos[IPPROTO_ICMP], &nf_nat_protocol_icmp); spin_unlock_bh(&nf_nat_lock); /* Initialize fake conntrack so that NAT will skip it */ @@ -748,12 +748,12 @@ static int __init nf_nat_init(void) l3proto = nf_ct_l3proto_find_get((u_int16_t)AF_INET); BUG_ON(nf_nat_seq_adjust_hook != NULL); - rcu_assign_pointer(nf_nat_seq_adjust_hook, nf_nat_seq_adjust); + RCU_INIT_POINTER(nf_nat_seq_adjust_hook, nf_nat_seq_adjust); BUG_ON(nfnetlink_parse_nat_setup_hook != NULL); - rcu_assign_pointer(nfnetlink_parse_nat_setup_hook, + RCU_INIT_POINTER(nfnetlink_parse_nat_setup_hook, nfnetlink_parse_nat_setup); BUG_ON(nf_ct_nat_offset != NULL); - rcu_assign_pointer(nf_ct_nat_offset, nf_nat_get_offset); + RCU_INIT_POINTER(nf_ct_nat_offset, nf_nat_get_offset); return 0; cleanup_extend: @@ -766,9 +766,9 @@ static void __exit nf_nat_cleanup(void) unregister_pernet_subsys(&nf_nat_net_ops); nf_ct_l3proto_put(l3proto); nf_ct_extend_unregister(&nat_extend); - rcu_assign_pointer(nf_nat_seq_adjust_hook, NULL); - rcu_assign_pointer(nfnetlink_parse_nat_setup_hook, NULL); - rcu_assign_pointer(nf_ct_nat_offset, NULL); + RCU_INIT_POINTER(nf_nat_seq_adjust_hook, NULL); + RCU_INIT_POINTER(nfnetlink_parse_nat_setup_hook, NULL); + RCU_INIT_POINTER(nf_ct_nat_offset, NULL); synchronize_net(); } -- cgit v1.2.3