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Commit 58f53974 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

[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: default avatarEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 78d79423

drivers/net/loopback.c

+3 −3
Original line number Diff line number Diff line
@@ -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;