SOCK_TIMESTAMP
#define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE))
else if (unlikely(sock_flag(sk, SOCK_TIMESTAMP)))
sock_enable_timestamp(sk, SOCK_TIMESTAMP);
sock_enable_timestamp(sk, SOCK_TIMESTAMP);
if (sock_flag(ep->base.sk, SOCK_TIMESTAMP))
(1UL << SOCK_TIMESTAMP) | \