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Commit c33e7b05 authored by YOSHIFUJI Hideaki / 吉藤英明's avatar YOSHIFUJI Hideaki / 吉藤英明 Committed by David S. Miller
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ipv6 anycast: Convert ipv6_sk_ac_lock to spinlock.



Since all users are write-lock, it does not make sense to use
rwlock here.  Use simple spinlock.

Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 18367681
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+8 −8
Original line number Diff line number Diff line
@@ -47,7 +47,7 @@
static int ipv6_dev_ac_dec(struct net_device *dev, const struct in6_addr *addr);

/* Big ac list lock for all the sockets */
static DEFINE_RWLOCK(ipv6_sk_ac_lock);
static DEFINE_SPINLOCK(ipv6_sk_ac_lock);


/*
@@ -128,10 +128,10 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, const struct in6_addr *addr)

	err = ipv6_dev_ac_inc(dev, addr);
	if (!err) {
		write_lock_bh(&ipv6_sk_ac_lock);
		spin_lock_bh(&ipv6_sk_ac_lock);
		pac->acl_next = np->ipv6_ac_list;
		np->ipv6_ac_list = pac;
		write_unlock_bh(&ipv6_sk_ac_lock);
		spin_unlock_bh(&ipv6_sk_ac_lock);
		pac = NULL;
	}

@@ -152,7 +152,7 @@ int ipv6_sock_ac_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
	struct ipv6_ac_socklist *pac, *prev_pac;
	struct net *net = sock_net(sk);

	write_lock_bh(&ipv6_sk_ac_lock);
	spin_lock_bh(&ipv6_sk_ac_lock);
	prev_pac = NULL;
	for (pac = np->ipv6_ac_list; pac; pac = pac->acl_next) {
		if ((ifindex == 0 || pac->acl_ifindex == ifindex) &&
@@ -161,7 +161,7 @@ int ipv6_sock_ac_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
		prev_pac = pac;
	}
	if (!pac) {
		write_unlock_bh(&ipv6_sk_ac_lock);
		spin_unlock_bh(&ipv6_sk_ac_lock);
		return -ENOENT;
	}
	if (prev_pac)
@@ -169,7 +169,7 @@ int ipv6_sock_ac_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
	else
		np->ipv6_ac_list = pac->acl_next;

	write_unlock_bh(&ipv6_sk_ac_lock);
	spin_unlock_bh(&ipv6_sk_ac_lock);

	rcu_read_lock();
	dev = dev_get_by_index_rcu(net, pac->acl_ifindex);
@@ -192,10 +192,10 @@ void ipv6_sock_ac_close(struct sock *sk)
	if (!np->ipv6_ac_list)
		return;

	write_lock_bh(&ipv6_sk_ac_lock);
	spin_lock_bh(&ipv6_sk_ac_lock);
	pac = np->ipv6_ac_list;
	np->ipv6_ac_list = NULL;
	write_unlock_bh(&ipv6_sk_ac_lock);
	spin_unlock_bh(&ipv6_sk_ac_lock);

	prev_index = 0;
	rcu_read_lock();