76 static int userio_char_open(struct inode *inode, struct file *file)  in userio_char_open()  argument
97 	file->private_data = userio;  in userio_char_open()
102 static int userio_char_release(struct inode *inode, struct file *file)  in userio_char_release()  argument
104 	struct userio_device *userio = file->private_data;  in userio_char_release()
121 static ssize_t userio_char_read(struct file *file, char __user *user_buffer,  in userio_char_read()  argument
124 	struct userio_device *userio = file->private_data;  in userio_char_read()
156 		if (file->f_flags & O_NONBLOCK)  in userio_char_read()
179 static ssize_t userio_char_write(struct file *file, const char __user *buffer,  in userio_char_write()  argument
182 	struct userio_device *userio = file->private_data;  in userio_char_write()
251 static unsigned int userio_char_poll(struct file *file, poll_table *wait)  in userio_char_poll()  argument
253 	struct userio_device *userio = file->private_data;  in userio_char_poll()
255 	poll_wait(file, &userio->waitq, wait);  in userio_char_poll()