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SOCKWQ_ASYNC_WAITDATA is set/cleared in sk_wait_data() and equivalent functions, so that sock_wake_async() can send a SIGIO only when necessary. Since these atomic operations are really not needed unless socket expressed interest in FASYNC, we can omit them in most cases. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>