net: remove NR_CPUS arrays in net/core/dev.c

Remove the fixed size channels[NR_CPUS] array in net/core/dev.c and
dynamically allocate array based on nr_cpu_ids.

Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 4 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index ed49da59205..a9500e6b3aa 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -162,7 +162,7 @@ struct net_dma {
         struct dma_client client;
         spinlock_t lock;
         cpumask_t channel_mask;
-        struct dma_chan *channels[NR_CPUS];
+        struct dma_chan **channels;
 };
 
 static enum dma_state_client
@@ -2444,7 +2444,7 @@ static struct netif_rx_stats *softnet_get_online(loff_t *pos)
 {
         struct netif_rx_stats *rc = NULL;
 
-        while (*pos < NR_CPUS)
+        while (*pos < nr_cpu_ids)
                 if (cpu_online(*pos)) {
                         rc = &per_cpu(netdev_rx_stat, *pos);
                         break;
@@ -4324,7 +4324,7 @@ netdev_dma_event(struct dma_client *client, struct dma_chan *chan,
         spin_lock(&net_dma->lock);
         switch (state) {
         case DMA_RESOURCE_AVAILABLE:
-                for (i = 0; i < NR_CPUS; i++)
+                for (i = 0; i < nr_cpu_ids; i++)
                         if (net_dma->channels[i] == chan) {
                                 found = 1;
                                 break;
@@ -4339,7 +4339,7 @@ netdev_dma_event(struct dma_client *client, struct dma_chan *chan,
                 }
                 break;
         case DMA_RESOURCE_REMOVED:
-                for (i = 0; i < NR_CPUS; i++)
+                for (i = 0; i < nr_cpu_ids; i++)
                         if (net_dma->channels[i] == chan) {
                                 found = 1;
                                 pos = i;
@@ -4366,6 +4366,13 @@ netdev_dma_event(struct dma_client *client, struct dma_chan *chan,
  */
 static int __init netdev_dma_register(void)
 {
+        net_dma.channels = kzalloc(nr_cpu_ids * sizeof(struct net_dma),
+                                                                GFP_KERNEL);
+        if (unlikely(!net_dma.channels)) {
+                printk(KERN_NOTICE
+                                "netdev_dma: no memory for net_dma.channels\n");
+                return -ENOMEM;
+        }
         spin_lock_init(&net_dma.lock);
         dma_cap_set(DMA_MEMCPY, net_dma.client.cap_mask);
         dma_async_client_register(&net_dma.client);