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| author | Eric Dumazet <dada1@cosmosbay.com> | 2006-10-20 00:32:41 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-10-20 00:32:41 -0700 |
| commit | 58f539740b1ccfc5ef4e509ec2efe82621b546e3 (patch) | |
| tree | f0e24b555808ce919528a0c5950e188768e97f23 /drivers/net/loopback.c | |
| parent | 78d79423179c0efc7ec34b55d287e7be4ca07da6 (diff) | |
| download | lwn-58f539740b1ccfc5ef4e509ec2efe82621b546e3.tar.gz lwn-58f539740b1ccfc5ef4e509ec2efe82621b546e3.zip | |
[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.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index 93fbea1c9271..82c10dec1b5a 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; |