decnet: RCU conversion and get rid of dev_base_lock

While tracking dev_base_lock users, I found decnet used it in
dnet_select_source(), but for a wrong purpose:

Writers only hold RTNL, not dev_base_lock, so readers must use RCU if
they cannot use RTNL.

Adds an rcu_head in struct dn_ifaddr and handle proper RCU management.

Adds __rcu annotation in dn_route as well.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index d8fd2c23a1b9..578debb801f4 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -951,7 +951,7 @@ struct net_device {
 #endif
         void                    *atalk_ptr;     /* AppleTalk link       */
         struct in_device __rcu  *ip_ptr;        /* IPv4 specific data   */
-        void                    *dn_ptr;        /* DECnet specific data */
+        struct dn_dev __rcu     *dn_ptr;        /* DECnet specific data */
         struct inet6_dev __rcu  *ip6_ptr;       /* IPv6 specific data */
         void                    *ec_ptr;        /* Econet specific data */
         void                    *ax25_ptr;      /* AX.25 specific data */