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Commit 9e0db4b1 authored by Eric W. Biederman's avatar Eric W. Biederman Committed by David S. Miller
Browse files

[NET]: Bring comments in loopback.c uptodate. 



A hint as to why it is safe to use per cpu variables,
and note that we actually can have multiple instances
of the loopback device now.

Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fe242cfd

drivers/net/loopback.c

+3 −1
Original line number Diff line number Diff line
@@ -154,6 +154,7 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev) 
#endif

	dev->last_rx = jiffies;



	/* it's OK to use per_cpu_ptr() because BHs are off */

	pcpu_lstats = netdev_priv(dev);

	lb_stats = per_cpu_ptr(pcpu_lstats, smp_processor_id());

	lb_stats->bytes += skb->len;
@@ -221,7 +222,8 @@ static void loopback_dev_free(struct net_device *dev) 
}



/*

 * The loopback device is special. There is only one instance.

 * The loopback device is special. There is only one instance

 * per network namespace.

 */

static void loopback_setup(struct net_device *dev)

{