sk_clone_lock    1606 include/net/sock.h struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority);
sk_clone_lock    1910 net/core/sock.c EXPORT_SYMBOL_GPL(sk_clone_lock);
sk_clone_lock     810 net/ipv4/inet_connection_sock.c 	struct sock *newsk = sk_clone_lock(sk, priority);