215 static ssize_t cm4040_read(struct file *filp, char __user *buf,  in cm4040_read()  argument
218 	struct reader_dev *dev = filp->private_data;  in cm4040_read()
234 	if (filp->f_flags & O_NONBLOCK) {  in cm4040_read()
317 static ssize_t cm4040_write(struct file *filp, const char __user *buf,  in cm4040_write()  argument
320 	struct reader_dev *dev = filp->private_data;  in cm4040_write()
338 	if (filp->f_flags & O_NONBLOCK) {  in cm4040_write()
418 static unsigned int cm4040_poll(struct file *filp, poll_table *wait)  in cm4040_poll()  argument
420 	struct reader_dev *dev = filp->private_data;  in cm4040_poll()
423 	poll_wait(filp, &dev->poll_wait, wait);  in cm4040_poll()
435 static int cm4040_open(struct inode *inode, struct file *filp)  in cm4040_open()  argument
458 	filp->private_data = dev;  in cm4040_open()
460 	if (filp->f_flags & O_NONBLOCK) {  in cm4040_open()
472 	ret = nonseekable_open(inode, filp);  in cm4040_open()
478 static int cm4040_close(struct inode *inode, struct file *filp)  in cm4040_close()  argument
480 	struct reader_dev *dev = filp->private_data;  in cm4040_close()