[NET]: Rework dev_base via list_head (v3)

Cleanup of dev_base list use, with the aim to simplify making device
list per-namespace. In almost every occasion, use of dev_base variable
and dev->next pointer could be easily replaced by for_each_netdev
loop. A few most complicated places were converted to using
first_netdev()/next_netdev().

Signed-off-by: Pavel Emelianov <xemul@openvz.org>
Acked-by: Kirill Korotaev <dev@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 3 deletions

diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c
index 7d57bf77f3a..5a54053386c 100644
--- a/net/core/dev_mcast.c
+++ b/net/core/dev_mcast.c
@@ -223,7 +223,7 @@ static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos)
         loff_t off = 0;
 
         read_lock(&dev_base_lock);
-        for (dev = dev_base; dev; dev = dev->next) {
+        for_each_netdev(dev) {
                 if (off++ == *pos)
                         return dev;
         }
@@ -232,9 +232,8 @@ static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos)
 
 static void *dev_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
-        struct net_device *dev = v;
         ++*pos;
-        return dev->next;
+        return next_net_device((struct net_device *)v);
 }
 
 static void dev_mc_seq_stop(struct seq_file *seq, void *v)