SOCK_MTX
error = msleep(&so->so_timeo, SOCK_MTX(so), PSOCK | PCATCH,
error = msleep(&head->sol_comp, SOCK_MTX(head), PSOCK | PCATCH,
sctp_clog.x.lock.sock_lock = mtx_owned(SOCK_MTX(inp->sctp_socket));
error = msleep(&so->so_timeo, SOCK_MTX(so),