[RTNETLINK]: Remove unnecessary locking in dump callbacks

Since we're now holding the rtnl during the entire dump operation, we can
remove additional locking for rtnl protected data. This patch does that
for all simple cases (dev_base_lock for dev_base walking, RCU protection
for FIB rule dumping).

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 3 deletions

diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
index 61be2caddc57..5c2a9951b638 100644
--- a/net/decnet/dn_dev.c
+++ b/net/decnet/dn_dev.c
@@ -799,7 +799,6 @@ static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
         skip_ndevs = cb->args[0];
         skip_naddr = cb->args[1];
 
-        read_lock(&dev_base_lock);
         for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
                 if (idx < skip_ndevs)
                         continue;
@@ -824,8 +823,6 @@ static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
                 }
         }
 done:
-        read_unlock(&dev_base_lock);
-
         cb->args[0] = idx;
         cb->args[1] = dn_idx;