[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, 7 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 9bed7569ce3f..193fd8637f9f 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -462,11 +462,6 @@ void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
         netlink_broadcast(rtnl, skb, 0, RTNLGRP_LINK, GFP_KERNEL);
 }
 
-static int rtnetlink_done(struct netlink_callback *cb)
-{
-        return 0;
-}
-
 /* Protected by RTNL sempahore.  */
 static struct rtattr **rta_buf;
 static int rtattr_max;
@@ -533,8 +528,7 @@ rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
                         goto err_inval;
 
                 if ((*errp = netlink_dump_start(rtnl, skb, nlh,
-                                                link->dumpit,
-                                                rtnetlink_done)) != 0) {
+                                                link->dumpit, NULL)) != 0) {
                         return -1;
                 }
                 rlen = NLMSG_ALIGN(nlh->nlmsg_len);