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} +FOPS_READ_ITER_HELPER(counter_chrdev_read); static __poll_t counter_chrdev_poll(struct file *filp, struct poll_table_struct *pollt) @@ -455,7 +456,7 @@ static int counter_chrdev_release(struct inode *inode, struct file *filp) static const struct file_operations counter_fops = { .owner = THIS_MODULE, .llseek = no_llseek, - .read = counter_chrdev_read, + .read_iter = counter_chrdev_read_iter, .poll = counter_chrdev_poll, .unlocked_ioctl = counter_chrdev_ioctl, .open = counter_chrdev_open, -- 2.43.0