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net: Implement for_each_netdev_reverse. 

I will need this shortly to implement network namespace shutdown
batching.  For sanity sake network devices should be removed in
the reverse order they were created in.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2009-11-29 22:25:26 +00:00 committed by David S. Miller
parent a5ee155136
commit dcbccbd4f1
1 changed files with 2 additions and 0 deletions
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include/linux/netdevice.h
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@ -1112,6 +1112,8 @@ extern rwlock_t dev_base_lock; /* Device list lock */
#define for_each_netdev(net, d) \
list_for_each_entry(d, &(net)->dev_base_head, dev_list)
#define for_each_netdev_reverse(net, d) \
list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
#define for_each_netdev_rcu(net, d) \
list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
#define for_each_netdev_safe(net, d, n) \