[NET]: Make the loopback device per network namespace.

This patch makes loopback_dev per network namespace.  Adding
code to create a different loopback device for each network
namespace and adding the code to free a loopback device
when a network namespace exits.

This patch modifies all users the loopback_dev so they
access it as init_net.loopback_dev, keeping all of the
code compiling and working.  A later pass will be needed to
update the users to use something other than the initial network
namespace.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
index bcaf4c5aa68e..26130afd8029 100644
--- a/net/decnet/dn_dev.c
+++ b/net/decnet/dn_dev.c
@@ -869,10 +869,10 @@ last_chance:
                 rv = dn_dev_get_first(dev, addr);
                 read_unlock(&dev_base_lock);
                 dev_put(dev);
-                if (rv == 0 || dev == loopback_dev)
+                if (rv == 0 || dev == init_net.loopback_dev)
                         return rv;
         }
-        dev = loopback_dev;
+        dev = init_net.loopback_dev;
         dev_hold(dev);
         goto last_chance;
 }