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authorYOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>2013-01-30 13:27:58 +0400
committerDavid S. Miller <davem@davemloft.net>2013-01-31 07:41:13 +0400
commitc33e7b05f1411b97cd0260ae682fc1cdb27bfaa4 (patch)
treed00958e4600cbef4a45b4622df6b3a9c4e205fa4 /net/ipv6/anycast.c
parent18367681a10bd29c3f2305e6b7b984de5b33d548 (diff)
downloadlinux-c33e7b05f1411b97cd0260ae682fc1cdb27bfaa4.tar.xz
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: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/anycast.c')
-rw-r--r--net/ipv6/anycast.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index 757a810d8f15..921b8b398a8c 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -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();