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authorEric Dumazet <dada1@cosmosbay.com>2006-10-20 00:32:41 -0700
committerDavid S. Miller <davem@davemloft.net>2006-10-20 00:32:41 -0700
commit58f539740b1ccfc5ef4e509ec2efe82621b546e3 (patch)
treef0e24b555808ce919528a0c5950e188768e97f23 /drivers/net/loopback.c
parent78d79423179c0efc7ec34b55d287e7be4ca07da6 (diff)
downloadop-kernel-dev-58f539740b1ccfc5ef4e509ec2efe82621b546e3.zip
op-kernel-dev-58f539740b1ccfc5ef4e509ec2efe82621b546e3.tar.gz
[NET]: Can use __get_cpu_var() instead of per_cpu() in loopback driver.
As BHs are off in loopback_xmit(), preemption cannot occurs, so we can use __get_cpu_var() instead of per_cpu() (and avoid a preempt_enable()/preempt_disable() pair) Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/loopback.c')
-rw-r--r--drivers/net/loopback.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index 93fbea1..82c10de 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -153,14 +153,14 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev)
#endif
dev->last_rx = jiffies;
- lb_stats = &per_cpu(pcpu_lstats, get_cpu());
+ /* it's OK to use __get_cpu_var() because BHs are off */
+ lb_stats = &__get_cpu_var(pcpu_lstats);
lb_stats->bytes += skb->len;
lb_stats->packets++;
- put_cpu();
netif_rx(skb);
- return(0);
+ return 0;
}
static struct net_device_stats loopback_stats;
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