vfio: Make vfio_(un)register_notifier accept a vfio_device

All callers have a struct vfio_device trivially available, pass it in
directly and avoid calling the expensive vfio_group_get_from_dev().

Acked-by: Eric Farman <[email protected]>
Reviewed-by: Jason J. Herne <[email protected]>
Reviewed-by: Tony Krowiak <[email protected]>
Reviewed-by: Kevin Tian <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alex Williamson <[email protected]>
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 66dda06..a00fd72 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -178,11 +178,11 @@ enum vfio_notify_type {
 /* events for VFIO_GROUP_NOTIFY */
 #define VFIO_GROUP_NOTIFY_SET_KVM	BIT(0)
 
-extern int vfio_register_notifier(struct device *dev,
+extern int vfio_register_notifier(struct vfio_device *device,
 				  enum vfio_notify_type type,
 				  unsigned long *required_events,
 				  struct notifier_block *nb);
-extern int vfio_unregister_notifier(struct device *dev,
+extern int vfio_unregister_notifier(struct vfio_device *device,
 				    enum vfio_notify_type type,
 				    struct notifier_block *nb);