Staging: iio: Staticise non-exported functions

Staticise a number of functions which aren't exported outside their
source files, and also add a __user annotation for the buffer in
iio_event_chrdev_read().

Signed-off-by: Mark Brown <[e-mail]>
Acked-by: Jonathan Cameron <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/iio/industrialio-core.c

···
 EXPORT_SYMBOL(iio_push_event);
 
 /* Generic interrupt line interrupt handler */
-irqreturn_t iio_interrupt_handler(int irq, void *_int_info)
+static irqreturn_t iio_interrupt_handler(int irq, void *_int_info)
 {
 	struct iio_interrupt *int_info = _int_info;
 	struct iio_dev *dev_info = int_info->dev_info;
···
 }
 EXPORT_SYMBOL(iio_remove_event_from_list);
 
-ssize_t iio_event_chrdev_read(struct file *filep,
-			      char *buf,
-			      size_t count,
-			      loff_t *f_ps)
+static ssize_t iio_event_chrdev_read(struct file *filep,
+				     char __user *buf,
+				     size_t count,
+				     loff_t *f_ps)
 {
 	struct iio_event_interface *ev_int = filep->private_data;
 	struct iio_detected_event_list *el;
···
 	return ret;
 }
 
-int iio_event_chrdev_release(struct inode *inode, struct file *filep)
+static int iio_event_chrdev_release(struct inode *inode, struct file *filep)
 {
 	struct iio_handler *hand = iio_cdev_to_handler(inode->i_cdev);
 	struct iio_event_interface *ev_int = hand->private;
···
 	return 0;
 }
 
-int iio_event_chrdev_open(struct inode *inode, struct file *filep)
+static int iio_event_chrdev_open(struct inode *inode, struct file *filep)
 {
 	struct iio_handler *hand = iio_cdev_to_handler(inode->i_cdev);
 	struct iio_event_interface *ev_int = hand->private;

drivers/staging/iio/trigger_consumer.h

···
  * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers
  * @dev_info: iio_dev associated with the device that will consume the trigger
  **/
-int iio_device_register_trigger_consumer(struct iio_dev *dev_info)
+static int iio_device_register_trigger_consumer(struct iio_dev *dev_info)
 {
 	return 0;
 };
···
  * iio_device_unregister_trigger_consumer() - reverse the registration process
  * @dev_info: iio_dev associated with the device that consumed the trigger
  **/
-int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info)
+static int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info)
 {
 	return 0;
 };