* -ENOSYS when not supported (equal to NULL callback)
* or a negative errno value when something bad happened
*
- * Return values for the get_ro callback should be:
+ * Return values for the get_cd callback should be:
* 0 for a absent card
* 1 for a present card
* -ENOSYS when not supported (equal to NULL callback)
struct led_trigger *led; /* activity led */
#endif
+ struct dentry *debugfs_root;
+
unsigned long private[0] ____cacheline_aligned;
};