1 files changed, 5 insertions, 0 deletions

diff --git a/net/socket.c b/net/socket.c
index a93c99b518ca..08847c3b8c39 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2587,6 +2587,11 @@ void sock_unregister(int family)
 }
 EXPORT_SYMBOL(sock_unregister);
 
+bool sock_is_registered(int family)
+{
+        return family < NPROTO && rcu_access_pointer(net_families[family]);
+}
+
 static int __init sock_init(void)
 {
         int err;