netlink: constify nlmsghdr arguments

Consitfy nlmsghdr arguments to a couple of functions as preparation
for the next patch, which will constify the netlink message data in
all nfnetlink users.

Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 9d03cc33b6cc..2dfb3e7a040d 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -1011,7 +1011,7 @@ replay:
 }
 
 static struct nlattr *
-find_dump_kind(struct nlmsghdr *n)
+find_dump_kind(const struct nlmsghdr *n)
 {
         struct nlattr *tb1, *tb2[TCA_ACT_MAX+1];
         struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];