[mac80211-next:netlink-validate-build-test-2 2/6] net/sched/act_tunnel_key.c:128:8: error: implicit declaration of function 'nla_validate_deprecated'

[kbuild test robot <lkp@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git netlink-validate-build-test-2
head:   963dafe164a051f6763a6fddf7b6d7933076985c
commit: e2e82c1203c1ab2423a79f486567a49228f546ab [2/6] netlink: make validation more configurable for future strictness
config: x86_64-randconfig-l3-03250457 (attached as .config)
compiler: gcc-5 (Debian 5.5.0-3) 5.4.1 20171010
reproduce:
        git checkout e2e82c1203c1ab2423a79f486567a49228f546ab
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   net/sched/act_tunnel_key.c: In function 'tunnel_key_copy_opts':
>> net/sched/act_tunnel_key.c:128:8: error: implicit declaration of function 'nla_validate_deprecated' [-Werror=implicit-function-declaration]
     err = nla_validate_deprecated(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
           ^
   cc1: some warnings being treated as errors

vim +/nla_validate_deprecated +128 net/sched/act_tunnel_key.c

   121	
   122	static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst,
   123					int dst_len, struct netlink_ext_ack *extack)
   124	{
   125		int err, rem, opt_len, len = nla_len(nla), opts_len = 0;
   126		const struct nlattr *attr, *head = nla_data(nla);
   127	
 > 128		err = nla_validate_deprecated(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
   129					      enc_opts_policy, extack);
   130		if (err)
   131			return err;
   132	
   133		nla_for_each_attr(attr, head, len, rem) {
   134			switch (nla_type(attr)) {
   135			case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
   136				opt_len = tunnel_key_copy_geneve_opt(attr, dst,
   137								     dst_len, extack);
   138				if (opt_len < 0)
   139					return opt_len;
   140				opts_len += opt_len;
   141				if (dst) {
   142					dst_len -= opt_len;
   143					dst += opt_len;
   144				}
   145				break;
   146			}
   147		}
   148	
   149		if (!opts_len) {
   150			NL_SET_ERR_MSG(extack, "Empty list of tunnel options");
   151			return -EINVAL;
   152		}
   153	
   154		if (rem > 0) {
   155			NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes");
   156			return -EINVAL;
   157		}
   158	
   159		return opts_len;
   160	}
   161	

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