input: __rcu annotations

Signed-off-by: Arnd Bergmann <[e-mail]>
Signed-off-by: Paul E. McKenney <[e-mail]>
Cc: Dmitry Torokhov <[e-mail]>
Acked-by: Dmitry Torokhov <[e-mail]>
Reviewed-by: Josh Triplett <[e-mail]>

drivers/input/evdev.c

···
 	int minor;
 	struct input_handle handle;
 	wait_queue_head_t wait;
-	struct evdev_client *grab;
+	struct evdev_client __rcu *grab;
 	struct list_head client_list;
 	spinlock_t client_lock; /* protects client_list */
 	struct mutex mutex;

include/linux/input.h

···
 	int (*flush)(struct input_dev *dev, struct file *file);
 	int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
 
-	struct input_handle *grab;
+	struct input_handle __rcu *grab;
 
 	spinlock_t event_lock;
 	struct mutex mutex;