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Subject[patch 19/41] cpu alloc: Convert loopback statistics
Convert loopback statistics to cpu alloc.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
drivers/net/loopback.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)

Index: linux-2.6/drivers/net/loopback.c
===================================================================
--- linux-2.6.orig/drivers/net/loopback.c 2008-05-28 22:02:18.000000000 -0700
+++ linux-2.6/drivers/net/loopback.c 2008-05-28 23:14:11.000000000 -0700
@@ -132,7 +132,7 @@
*/
static int loopback_xmit(struct sk_buff *skb, struct net_device *dev)
{
- struct pcpu_lstats *pcpu_lstats, *lb_stats;
+ struct pcpu_lstats *pcpu_lstats;

skb_orphan(skb);

@@ -152,11 +152,10 @@
#endif
dev->last_rx = jiffies;

- /* it's OK to use per_cpu_ptr() because BHs are off */
+ /* it's OK to use __xxx cpu operations because BHs are off */
pcpu_lstats = netdev_priv(dev);
- lb_stats = per_cpu_ptr(pcpu_lstats, smp_processor_id());
- lb_stats->bytes += skb->len;
- lb_stats->packets++;
+ __CPU_ADD(pcpu_lstats->bytes, skb->len);
+ __CPU_INC(pcpu_lstats->packets);

netif_rx(skb);

@@ -175,7 +174,7 @@
for_each_possible_cpu(i) {
const struct pcpu_lstats *lb_stats;

- lb_stats = per_cpu_ptr(pcpu_lstats, i);
+ lb_stats = CPU_PTR(pcpu_lstats, i);
bytes += lb_stats->bytes;
packets += lb_stats->packets;
}
@@ -203,7 +202,7 @@
{
struct pcpu_lstats *lstats;

- lstats = alloc_percpu(struct pcpu_lstats);
+ lstats = CPU_ALLOC(struct pcpu_lstats, GFP_KERNEL | __GFP_ZERO);
if (!lstats)
return -ENOMEM;

@@ -215,7 +214,7 @@
{
struct pcpu_lstats *lstats = netdev_priv(dev);

- free_percpu(lstats);
+ CPU_FREE(lstats);
free_netdev(dev);
}

--


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