[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/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index c35336a0f71b..6996b7e85665 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -948,11 +948,6 @@ static struct xfrm_link {
         [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy  },
 };
 
-static int xfrm_done(struct netlink_callback *cb)
-{
-        return 0;
-}
-
 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
 {
         struct rtattr *xfrma[XFRMA_MAX];
@@ -990,8 +985,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *err
                         goto err_einval;
 
                 if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh,
-                                                link->dump,
-                                                xfrm_done)) != 0) {
+                                                link->dump, NULL)) != 0) {
                         return -1;
                 }
                 rlen = NLMSG_ALIGN(nlh->nlmsg_len);