[NETLINK]: Make netlink_callback->done() optional

Most netlink families make no use of the done() callback, making
it optional gets rid of all unnecessary dummy implementations.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 227e99ed510c..f7f42c3e96cb 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1710,7 +1710,7 @@ static void fib6_dump_end(struct netlink_callback *cb)
 static int fib6_dump_done(struct netlink_callback *cb)
 {
         fib6_dump_end(cb);
-        return cb->done(cb);
+        return cb->done ? cb->done(cb) : 0;
 }
 
 int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)