SK_PACING_NONE
SK_PACING_NONE,
cmpxchg(&sk->sk_pacing_status, SK_PACING_NONE, SK_PACING_NEEDED);
if (sk->sk_pacing_status == SK_PACING_NONE)
if (sk->sk_pacing_status != SK_PACING_NONE) {
if (sk->sk_pacing_status == SK_PACING_NONE)
__sync_bool_compare_and_swap(&sk->sk_pacing_status, SK_PACING_NONE,