[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, 5 insertions, 2 deletions

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 8699e7006d80..bec600af03ca 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -894,9 +894,10 @@ static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
         s_idx = cb->args[0];
         s_q_idx = q_idx = cb->args[1];
         read_lock(&dev_base_lock);
-        for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
+        idx = 0;
+        for_each_netdev(dev) {
                 if (idx < s_idx)
-                        continue;
+                        goto cont;
                 if (idx > s_idx)
                         s_q_idx = 0;
                 q_idx = 0;
@@ -910,6 +911,8 @@ static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
                                 goto done;
                         q_idx++;
                 }
+cont:
+                idx++;
         }
 
 done: