netlink: add netlink_dump_control structure for netlink_dump_start()

Davem considers that the argument list of this interface is getting
out of control. This patch tries to address this issue following
his proposal:

struct netlink_dump_control c = { .dump = dump, .done = done, ... };

netlink_dump_start(..., &c);

Suggested by David S. Miller.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 3 deletions

diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c
index 16f8693cc147..b6ac1387770c 100644
--- a/crypto/crypto_user.c
+++ b/crypto/crypto_user.c
@@ -389,9 +389,13 @@ static int crypto_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
             (nlh->nlmsg_flags & NLM_F_DUMP))) {
                 if (link->dump == NULL)
                         return -EINVAL;
-
-                return netlink_dump_start(crypto_nlsk, skb, nlh,
-                                          link->dump, link->done, 0);
+                {
+                        struct netlink_dump_control c = {
+                                .dump = link->dump,
+                                .done = link->done,
+                        };
+                        return netlink_dump_start(crypto_nlsk, skb, nlh, &c);
+                }
         }
 
         err = nlmsg_parse(nlh, crypto_msg_min[type], attrs, CRYPTOCFGA_MAX,