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

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [NET]: Allow skb headroom to be overridden
  [TCP]: Kill unused extern decl for tcp_v4_hash_connecting()
  [NET]: add SO_RCVBUF comment
  [NET]: Deinline some larger functions from netdevice.h
  [DCCP]: Use NULL for pointers, comfort sparse.
  [DECNET]: Fix refcount

4 files changed, 83 insertions, 5 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index a3ab11f34153..434220d093aa 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1080,6 +1080,70 @@ void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
         rcu_read_unlock();
 }
 
+
+void __netif_schedule(struct net_device *dev)
+{
+        if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
+                unsigned long flags;
+                struct softnet_data *sd;
+
+                local_irq_save(flags);
+                sd = &__get_cpu_var(softnet_data);
+                dev->next_sched = sd->output_queue;
+                sd->output_queue = dev;
+                raise_softirq_irqoff(NET_TX_SOFTIRQ);
+                local_irq_restore(flags);
+        }
+}
+EXPORT_SYMBOL(__netif_schedule);
+
+void __netif_rx_schedule(struct net_device *dev)
+{
+        unsigned long flags;
+
+        local_irq_save(flags);
+        dev_hold(dev);
+        list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
+        if (dev->quota < 0)
+                dev->quota += dev->weight;
+        else
+                dev->quota = dev->weight;
+        __raise_softirq_irqoff(NET_RX_SOFTIRQ);
+        local_irq_restore(flags);
+}
+EXPORT_SYMBOL(__netif_rx_schedule);
+
+void dev_kfree_skb_any(struct sk_buff *skb)
+{
+        if (in_irq() || irqs_disabled())
+                dev_kfree_skb_irq(skb);
+        else
+                dev_kfree_skb(skb);
+}
+EXPORT_SYMBOL(dev_kfree_skb_any);
+
+
+/* Hot-plugging. */
+void netif_device_detach(struct net_device *dev)
+{
+        if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
+            netif_running(dev)) {
+                netif_stop_queue(dev);
+        }
+}
+EXPORT_SYMBOL(netif_device_detach);
+
+void netif_device_attach(struct net_device *dev)
+{
+        if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
+            netif_running(dev)) {
+                netif_wake_queue(dev);
+                __netdev_watchdog_up(dev);
+        }
+}
+EXPORT_SYMBOL(netif_device_attach);
+
+
 /*
  * Invalidate hardware checksum when packet is to be mangled, and
  * complete checksum manually on outgoing path.
diff --git a/net/core/sock.c b/net/core/sock.c
index a96ea7dd0fc1..ed2afdb9ea2d 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -385,7 +385,21 @@ set_sndbuf:
                                 val = sysctl_rmem_max;
 set_rcvbuf:
                         sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
-                        /* FIXME: is this lower bound the right one? */
+                        /*
+                         * We double it on the way in to account for
+                         * "struct sk_buff" etc. overhead.   Applications
+                         * assume that the SO_RCVBUF setting they make will
+                         * allow that much actual data to be received on that
+                         * socket.
+                         *
+                         * Applications are unaware that "struct sk_buff" and
+                         * other overheads allocate from the receive buffer
+                         * during socket buffer allocation.
+                         *
+                         * And after considering the possible alternatives,
+                         * returning the value we actually used in getsockopt
+                         * is the most desirable behavior.
+                         */
                         if ((val * 2) < SOCK_MIN_RCVBUF)
                                 sk->sk_rcvbuf = SOCK_MIN_RCVBUF;
                         else
diff --git a/net/dccp/feat.c b/net/dccp/feat.c
index e3dd30d36c8a..b39e2a597889 100644
--- a/net/dccp/feat.c
+++ b/net/dccp/feat.c
@@ -204,7 +204,7 @@ static int dccp_feat_reconcile(struct sock *sk, struct dccp_opt_pend *opt,
         if (rc) {
                 kfree(opt->dccpop_sc->dccpoc_val);
                 kfree(opt->dccpop_sc);
-                opt->dccpop_sc = 0;
+                opt->dccpop_sc = NULL;
                 return rc;
         }
 
@@ -322,7 +322,7 @@ static void dccp_feat_empty_confirm(struct dccp_minisock *dmsk,
         opt->dccpop_type = type == DCCPO_CHANGE_L ? DCCPO_CONFIRM_R :
                                                     DCCPO_CONFIRM_L;
         opt->dccpop_feat = feature;
-        opt->dccpop_val  = 0;
+        opt->dccpop_val  = NULL;
         opt->dccpop_len  = 0;
 
         /* change feature */
@@ -523,7 +523,7 @@ int dccp_feat_clone(struct sock *oldsk, struct sock *newsk)
                  * once...
                  */
                 /* the master socket no longer needs to worry about confirms */
-                opt->dccpop_sc = 0; /* it's not a memleak---new socket has it */
+                opt->dccpop_sc = NULL; /* it's not a memleak---new socket has it */
 
                 /* reset state for a new socket */
                 opt->dccpop_conf = 0;
diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
index d2ae9893ca17..a26ff9f44576 100644
--- a/net/decnet/dn_dev.c
+++ b/net/decnet/dn_dev.c
@@ -620,7 +620,7 @@ int dn_dev_set_default(struct net_device *dev, int force)
         }
         write_unlock(&dndev_lock);
         if (old)
-                dev_put(dev);
+                dev_put(old);
         return rv;
 }