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 <broonie@opensource.wolfsonmicro.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/industrialio-core.c

@@ -118,7 +118,7 @@ int iio_push_event(struct iio_dev *dev_info,
 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;
@@ -252,8 +252,8 @@ void iio_remove_event_from_list(struct iio_event_handler_list *el,
 }
 EXPORT_SYMBOL(iio_remove_event_from_list);
 
-ssize_t iio_event_chrdev_read(struct file *filep,
-			      char *buf,
+static ssize_t iio_event_chrdev_read(struct file *filep,
+				     char __user *buf,
 				     size_t count,
 				     loff_t *f_ps)
 {
@@ -313,7 +313,7 @@ ssize_t iio_event_chrdev_read(struct file *filep,
 	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;
@@ -335,7 +335,7 @@ int iio_event_chrdev_release(struct inode *inode, struct file *filep)
 	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

@@ -27,7 +27,7 @@ int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info);
  * 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;
 };
@@ -36,7 +36,7 @@ int iio_device_register_trigger_consumer(struct iio_dev *dev_info)
  * 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;
 };