Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/ipmr-2.6

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 470f7c9..55c2086 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1331,7 +1331,7 @@ struct softnet_data {
        struct sk_buff          *completion_queue;
 
        /* Elements below can be accessed between CPUs for RPS */
-#ifdef CONFIG_SMP
+#ifdef CONFIG_RPS
        struct call_single_data csd ____cacheline_aligned_in_smp;
 #endif
        struct sk_buff_head     input_pkt_queue;

diff --git a/net/core/dev.c b/net/core/dev.c
index 876b111..e8041eb 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2206,6 +2206,7 @@ DEFINE_PER_CPU(struct netif_rx_stats, netdev_rx_stat) = { 0, };
 /*
  * get_rps_cpu is called from netif_receive_skb and returns the target
  * CPU from the RPS map of the receiving queue for a given skb.
+ * rcu_read_lock must be held on entry.
  */
 static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb)
 {
@@ -2217,8 +2218,6 @@ static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb)
        u8 ip_proto;
        u32 addr1, addr2, ports, ihl;
 
-       rcu_read_lock();
-
        if (skb_rx_queue_recorded(skb)) {
                u16 index = skb_get_rx_queue(skb);
                if (unlikely(index >= dev->num_rx_queues)) {
@@ -2296,7 +2295,6 @@ got_hash:
        }
 
 done:
-       rcu_read_unlock();
        return cpu;
 }
 
@@ -2392,7 +2390,7 @@ enqueue:
 
 int netif_rx(struct sk_buff *skb)
 {
-       int cpu;
+       int ret;
 
        /* if netpoll wants it, pretend we never saw it */
        if (netpoll_rx(skb))
@@ -2402,14 +2400,21 @@ int netif_rx(struct sk_buff *skb)
                net_timestamp(skb);
 
 #ifdef CONFIG_RPS
-       cpu = get_rps_cpu(skb->dev, skb);
-       if (cpu < 0)
-               cpu = smp_processor_id();
+       {
+               int cpu;
+
+               rcu_read_lock();
+               cpu = get_rps_cpu(skb->dev, skb);
+               if (cpu < 0)
+                       cpu = smp_processor_id();
+               ret = enqueue_to_backlog(skb, cpu);
+               rcu_read_unlock();
+       }
 #else
-       cpu = smp_processor_id();
+       ret = enqueue_to_backlog(skb, get_cpu());
+       put_cpu();
 #endif
-
-       return enqueue_to_backlog(skb, cpu);
+       return ret;
 }
 EXPORT_SYMBOL(netif_rx);