passed to us _is_ an eventpoll file. And also we do not permit * adding an epoll file descriptor inside itself. */ error = -EINVAL; if (f.file == tf.file || !is_file_epoll(f.file)) goto erro... inside another epoll file * descriptor, there is the change of creating closed loops, which are * better be handled here, than in more critical paths. While we are * checking for loops we als...