POLL_ERR         2790 net/core/sock.c 	sk_wake_async(sk, SOCK_WAKE_IO, POLL_ERR);
POLL_ERR          155 net/dccp/input.c 		sk_wake_async(sk, SOCK_WAKE_IO, POLL_ERR);
POLL_ERR         1827 sound/core/control.c 		kill_fasync(&ctl->fasync, SIGIO, POLL_ERR);