dnotify: move dir_notify_enable declaration

Move dir_notify_enable declaration to where it belongs -- dnotify.h .

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/include/linux/dnotify.h b/include/linux/dnotify.h
index ecc0628..3290555 100644
--- a/include/linux/dnotify.h
+++ b/include/linux/dnotify.h
@@ -28,6 +28,7 @@
 			    FS_CREATE | FS_DN_RENAME |\
 			    FS_MOVED_FROM | FS_MOVED_TO)
 
+extern int dir_notify_enable;
 extern void dnotify_flush(struct file *, fl_owner_t);
 extern int fcntl_dirnotify(int, struct file *, unsigned long);