diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 2bfb2ad2fab1981696e52a914cd89a0dad495e76..877f682989b892fb1d70256bda6b33f03e34a0f5 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -133,27 +133,18 @@ void rt6_clean_tohost(struct net *net, struct in6_addr *gateway);
/*
* Store a destination cache entry in a socket
*/
-static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
- const struct in6_addr *daddr,
- const struct in6_addr *saddr)
+static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
+ const struct in6_addr *daddr,
+ const struct in6_addr *saddr)
{
struct ipv6_pinfo *np = inet6_sk(sk);
- struct rt6_info *rt = (struct rt6_info *) dst;
+ np->dst_cookie = rt6_get_cookie((struct rt6_info *)dst);
sk_setup_caps(sk, dst);
np->daddr_cache = daddr;
#ifdef CONFIG_IPV6_SUBTREES
np->saddr_cache = saddr;
#endif
- np->dst_cookie = rt6_get_cookie(rt);
-}
-
-static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
- struct in6_addr *daddr, struct in6_addr *saddr)
-{
- spin_lock(&sk->sk_dst_lock);
- __ip6_dst_store(sk, dst, daddr, saddr);
- spin_unlock(&sk->sk_dst_lock);
}
static inline bool ipv6_unicast_destination(const struct sk_buff *skb)
diff --git a/include/net/sock.h b/include/net/sock.h
index 0434138c5f9522f2bcc02f2b49b3a749d45beb94..52d27ee924f47867026d8f65c65551a9137219d3 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -254,7 +254,6 @@ struct cg_proto;
* @sk_wq: sock wait queue and async head
* @sk_rx_dst: receive input route used by early demux
* @sk_dst_cache: destination cache
- * @sk_dst_lock: destination cache lock
* @sk_policy: flow policy
* @sk_receive_queue: incoming packets
* @sk_wmem_alloc: transmit queue bytes committed
@@ -393,7 +392,7 @@ struct sock {
#endif
struct dst_entry *sk_rx_dst;
struct dst_entry __rcu *sk_dst_cache;
- spinlock_t sk_dst_lock;
+ /* Note: 32bit hole on 64bit arches */
atomic_t sk_wmem_alloc;
atomic_t sk_omem_alloc;
int sk_sndbuf;
diff --git a/net/core/sock.c b/net/core/sock.c
index 9d79569935a3687cf21977a7c7969d15c3ebf80b..e31dfcee1729aa23bdd2ed692fda1b90bd75afb8 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1530,7 +1530,6 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
skb_queue_head_init(&newsk->sk_receive_queue);
skb_queue_head_init(&newsk->sk_write_queue);
- spin_lock_init(&newsk->sk_dst_lock);
rwlock_init(&newsk->sk_callback_lock);
lockdep_set_class_and_name(&newsk->sk_callback_lock,
af_callback_keys + newsk->sk_family,
@@ -1607,7 +1606,7 @@ void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
{
u32 max_segs = 1;
- __sk_dst_set(sk, dst);
+ sk_dst_set(sk, dst);
sk->sk_route_caps = dst->dev->features;
if (sk->sk_route_caps & NETIF_F_GSO)
sk->sk_route_caps |= NETIF_F_GSO_SOFTWARE;
@@ -2388,7 +2387,6 @@ void sock_init_data(struct socket *sock, struct sock *sk)
} else
sk->sk_wq = NULL;
- spin_lock_init(&sk->sk_dst_lock);
rwlock_init(&sk->sk_callback_lock);
lockdep_set_class_and_name(&sk->sk_callback_lock,
af_callback_keys + sk->sk_family,
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index e7e0b9bc2a43ec2ef571caa6324c445af1ce6d70..9c6d0508e63a2ab7f13105cd91ea8c027c4a7557 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -459,7 +459,7 @@ static struct sock *dccp_v6_request_recv_sock(const struct sock *sk,
* comment in that function for the gory details. -acme
*/
- __ip6_dst_store(newsk, dst, NULL, NULL);
+ ip6_dst_store(newsk, dst, NULL, NULL);
newsk->sk_route_caps = dst->dev->features & ~(NETIF_F_IP_CSUM |
NETIF_F_TSO);
newdp6 = (struct dccp6_sock *)newsk;
@@ -883,7 +883,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
np->saddr = *saddr;
inet->inet_rcv_saddr = LOOPBACK4_IPV6;
- __ip6_dst_store(sk, dst, NULL, NULL);
+ ip6_dst_store(sk, dst, NULL, NULL);
icsk->icsk_ext_hdr_len = 0;
if (opt)
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 38d66ddfb9375b812b4a6b6d6f52775af140c372..8ec0df75f1c4f81bea71cb466c4da802c39099d8 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -673,7 +673,7 @@ int inet6_sk_rebuild_header(struct sock *sk)
return PTR_ERR(dst);
}
- __ip6_dst_store(sk, dst, NULL, NULL);
+ ip6_dst_store(sk, dst, NULL, NULL);
}
return 0;
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 36c5a98b04727b220e9ea77e00d96410d4bb3f74..0a37ddc7af51579f56b644ba0e4c3c3a7a2e2bc7 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -834,11 +834,6 @@ void icmpv6_flow_init(struct sock *sk, struct flowi6 *fl6,
security_sk_classify_flow(sk, flowi6_to_flowi(fl6));
}
-/*
- * Special lock-class for __icmpv6_sk:
- */
-static struct lock_class_key icmpv6_socket_sk_dst_lock_key;
-
static int __net_init icmpv6_sk_init(struct net *net)
{
struct sock *sk;
@@ -860,15 +855,6 @@ static int __net_init icmpv6_sk_init(struct net *net)
net->ipv6.icmp_sk[i] = sk;
- /*
- * Split off their lock-class, because sk->sk_dst_lock
- * gets used from softirqs, which is safe for
- * __icmpv6_sk (because those never get directly used
- * via userspace syscalls), but unsafe for normal sockets.
- */
- lockdep_set_class(&sk->sk_dst_lock,
- &icmpv6_socket_sk_dst_lock_key);
-
/* Enough space for 2 64K ICMP packets, including
* sk_buff struct overhead.
*/
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index 3ff5208772bb5d13b7d2f86c8aa866f47a5f5f07..a7ca2cde2ecbcff85c9a6151b4770e3897d16314 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -110,14 +110,6 @@ void inet6_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr)
}
EXPORT_SYMBOL_GPL(inet6_csk_addr2sockaddr);
-static inline
-void __inet6_csk_dst_store(struct sock *sk, struct dst_entry *dst,
- const struct in6_addr *daddr,
- const struct in6_addr *saddr)
-{
- __ip6_dst_store(sk, dst, daddr, saddr);
-}
-
static inline
struct dst_entry *__inet6_csk_dst_check(struct sock *sk, u32 cookie)
{
@@ -153,7 +145,7 @@ static struct dst_entry *inet6_csk_route_socket(struct sock *sk,
dst = ip6_dst_lookup_flow(sk, fl6, final_p);
if (!IS_ERR(dst))
- __inet6_csk_dst_store(sk, dst, NULL, NULL);
+ ip6_dst_store(sk, dst, NULL, NULL);
}
return dst;
}
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 6a50bb4a0dae4499e6c8ec687a1a78cd17306adb..e7aab561b7b463d4bfbdd7e7a89302403e252560 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -257,7 +257,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
inet->inet_rcv_saddr = LOOPBACK4_IPV6;
sk->sk_gso_type = SKB_GSO_TCPV6;
- __ip6_dst_store(sk, dst, NULL, NULL);
+ ip6_dst_store(sk, dst, NULL, NULL);
if (tcp_death_row.sysctl_tw_recycle &&
!tp->rx_opt.ts_recent_stamp &&
@@ -1060,7 +1060,7 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff *
*/
newsk->sk_gso_type = SKB_GSO_TCPV6;
- __ip6_dst_store(newsk, dst, NULL, NULL);
+ ip6_dst_store(newsk, dst, NULL, NULL);
inet6_sk_rx_dst_set(newsk, skb);
newtcp6sk = (struct tcp6_sock *)newsk;