net: sk_update_clone is only used in net/core/sock.c

so move it there.  Fixes build errors when CONFIG_INET is not defined:

In file included from include/linux/tcp.h:211:0,
                 from include/linux/ipv6.h:221,
                 from include/net/ipv6.h:16,
                 from include/linux/sunrpc/clnt.h:26,
                 from include/linux/nfs_fs.h:50,
                 from init/do_mounts.c:20:
include/net/sock.h: In function 'sk_update_clone':
include/net/sock.h:1109:3: error: implicit declaration of function 'sock_update_memcg' [-Werror=implicit-function-declaration]

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/core/sock.c b/net/core/sock.c
index e80b64fbd663..c3ae73de0239 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1272,6 +1272,12 @@ void sk_release_kernel(struct sock *sk)
 }
 EXPORT_SYMBOL(sk_release_kernel);
 
+static void sk_update_clone(const struct sock *sk, struct sock *newsk)
+{
+        if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
+                sock_update_memcg(newsk);
+}
+
 /**
  *      sk_clone_lock - clone a socket, and lock its clone
  *      @sk: the socket to clone