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authorTom Herbert <therbert@google.com>2010-03-19 03:45:44 +0300
committerDavid S. Miller <davem@davemloft.net>2010-03-19 03:45:44 +0300
commit1e94d72feab025b8f7c55d07020602f82f3a97dd (patch)
treef8d38b4fa5b51046e1bbcaf8f3fc88edc2052cae /net/core/dev.c
parenta034016287236f435dbb8f1f57aee906f22b4598 (diff)
downloadlinux-1e94d72feab025b8f7c55d07020602f82f3a97dd.tar.xz
rps: Fixed build with CONFIG_SMP not enabled.
Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dev.c')
-rw-r--r--net/core/dev.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 17b168671501..1a7e1d1d5ad9 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2174,6 +2174,7 @@ int weight_p __read_mostly = 64; /* old backlog weight */
DEFINE_PER_CPU(struct netif_rx_stats, netdev_rx_stat) = { 0, };
+#ifdef CONFIG_SMP
/*
* 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.
@@ -2293,6 +2294,7 @@ static void trigger_softirq(void *data)
__napi_schedule(&queue->backlog);
__get_cpu_var(netdev_rx_stat).received_rps++;
}
+#endif /* CONFIG_SMP */
/*
* enqueue_to_backlog is called to queue an skb to a per CPU backlog
@@ -2320,6 +2322,7 @@ enqueue:
/* Schedule NAPI for backlog device */
if (napi_schedule_prep(&queue->backlog)) {
+#ifdef CONFIG_SMP
if (cpu != smp_processor_id()) {
struct rps_remote_softirq_cpus *rcpus =
&__get_cpu_var(rps_remote_softirq_cpus);
@@ -2328,6 +2331,9 @@ enqueue:
__raise_softirq_irqoff(NET_RX_SOFTIRQ);
} else
__napi_schedule(&queue->backlog);
+#else
+ __napi_schedule(&queue->backlog);
+#endif
}
goto enqueue;
}
@@ -2367,9 +2373,13 @@ int netif_rx(struct sk_buff *skb)
if (!skb->tstamp.tv64)
net_timestamp(skb);
+#ifdef CONFIG_SMP
cpu = get_rps_cpu(skb->dev, skb);
if (cpu < 0)
cpu = smp_processor_id();
+#else
+ cpu = smp_processor_id();
+#endif
return enqueue_to_backlog(skb, cpu);
}
@@ -2735,6 +2745,7 @@ out:
*/
int netif_receive_skb(struct sk_buff *skb)
{
+#ifdef CONFIG_SMP
int cpu;
cpu = get_rps_cpu(skb->dev, skb);
@@ -2743,6 +2754,9 @@ int netif_receive_skb(struct sk_buff *skb)
return __netif_receive_skb(skb);
else
return enqueue_to_backlog(skb, cpu);
+#else
+ return __netif_receive_skb(skb);
+#endif
}
EXPORT_SYMBOL(netif_receive_skb);
@@ -3168,6 +3182,7 @@ void netif_napi_del(struct napi_struct *napi)
}
EXPORT_SYMBOL(netif_napi_del);
+#ifdef CONFIG_SMP
/*
* net_rps_action sends any pending IPI's for rps. This is only called from
* softirq and interrupts must be enabled.
@@ -3184,6 +3199,7 @@ static void net_rps_action(cpumask_t *mask)
}
cpus_clear(*mask);
}
+#endif
static void net_rx_action(struct softirq_action *h)
{
@@ -3191,8 +3207,10 @@ static void net_rx_action(struct softirq_action *h)
unsigned long time_limit = jiffies + 2;
int budget = netdev_budget;
void *have;
+#ifdef CONFIG_SMP
int select;
struct rps_remote_softirq_cpus *rcpus;
+#endif
local_irq_disable();
@@ -3255,6 +3273,7 @@ static void net_rx_action(struct softirq_action *h)
netpoll_poll_unlock(have);
}
out:
+#ifdef CONFIG_SMP
rcpus = &__get_cpu_var(rps_remote_softirq_cpus);
select = rcpus->select;
rcpus->select ^= 1;
@@ -3262,6 +3281,9 @@ out:
local_irq_enable();
net_rps_action(&rcpus->mask[select]);
+#else
+ local_irq_enable();
+#endif
#ifdef CONFIG_NET_DMA
/*
@@ -6204,9 +6226,11 @@ static int __init net_dev_init(void)
queue->completion_queue = NULL;
INIT_LIST_HEAD(&queue->poll_list);
+#ifdef CONFIG_SMP
queue->csd.func = trigger_softirq;
queue->csd.info = queue;
queue->csd.flags = 0;
+#endif
queue->backlog.poll = process_backlog;
queue->backlog.weight = weight_p;