Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1699 commits)
  bnx2/bnx2x: Unsupported Ethtool operations should return -EINVAL.
  vlan: Calling vlan_hwaccel_do_receive() is always valid.
  tproxy: use the interface primary IP address as a default value for --on-ip
  tproxy: added IPv6 support to the socket match
  cxgb3: function namespace cleanup
  tproxy: added IPv6 support to the TPROXY target
  tproxy: added IPv6 socket lookup function to nf_tproxy_core
  be2net: Changes to use only priority codes allowed by f/w
  tproxy: allow non-local binds of IPv6 sockets if IP_TRANSPARENT is enabled
  tproxy: added tproxy sockopt interface in the IPV6 layer
  tproxy: added udp6_lib_lookup function
  tproxy: added const specifiers to udp lookup functions
  tproxy: split off ipv6 defragmentation to a separate module
  l2tp: small cleanup
  nf_nat: restrict ICMP translation for embedded header
  can: mcp251x: fix generation of error frames
  can: mcp251x: fix endless loop in interrupt handler if CANINTF_MERRF is set
  can-raw: add msg_flags to distinguish local traffic
  9p: client code cleanup
  rds: make local functions/variables static
  ...

Fix up conflicts in net/core/dev.c, drivers/net/pcmcia/smc91c92_cs.c and
drivers/net/wireless/ath/ath9k/debug.c as per David

1 files changed, 5 insertions, 26 deletions

diff --git a/net/ipv4/protocol.c b/net/ipv4/protocol.c
index f2d297351405..65699c24411c 100644
--- a/net/ipv4/protocol.c
+++ b/net/ipv4/protocol.c
@@ -28,8 +28,7 @@
 #include <linux/spinlock.h>
 #include <net/protocol.h>
 
-const struct net_protocol *inet_protos[MAX_INET_PROTOS] ____cacheline_aligned_in_smp;
-static DEFINE_SPINLOCK(inet_proto_lock);
+const struct net_protocol *inet_protos[MAX_INET_PROTOS] __read_mostly;
 
 /*
  *	Add a protocol handler to the hash tables
@@ -37,20 +36,9 @@ static DEFINE_SPINLOCK(inet_proto_lock);
 
 int inet_add_protocol(const struct net_protocol *prot, unsigned char protocol)
 {
-	int hash, ret;
+	int hash = protocol & (MAX_INET_PROTOS - 1);
 
-	hash = protocol & (MAX_INET_PROTOS - 1);
-
-	spin_lock_bh(&inet_proto_lock);
-	if (inet_protos[hash]) {
-		ret = -1;
-	} else {
-		inet_protos[hash] = prot;
-		ret = 0;
-	}
-	spin_unlock_bh(&inet_proto_lock);
-
-	return ret;
+	return !cmpxchg(&inet_protos[hash], NULL, prot) ? 0 : -1;
 }
 EXPORT_SYMBOL(inet_add_protocol);
 
@@ -60,18 +48,9 @@ EXPORT_SYMBOL(inet_add_protocol);
 
 int inet_del_protocol(const struct net_protocol *prot, unsigned char protocol)
 {
-	int hash, ret;
-
-	hash = protocol & (MAX_INET_PROTOS - 1);
+	int ret, hash = protocol & (MAX_INET_PROTOS - 1);
 
-	spin_lock_bh(&inet_proto_lock);
-	if (inet_protos[hash] == prot) {
-		inet_protos[hash] = NULL;
-		ret = 0;
-	} else {
-		ret = -1;
-	}
-	spin_unlock_bh(&inet_proto_lock);
+	ret = (cmpxchg(&inet_protos[hash], prot, NULL) == prot) ? 0 : -1;
 
 	synchronize_net();