kernfs: Change kernfs_node lockdep name to "kn->active"

The kernfs_node lockdep tracking is being done on kn->active, the
active reference count. The other reference count (kn->count) is not
tracked by lockdep. So change the lockdep name to reflect what it is
tracking.

Signed-off-by: Waiman Long <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Waiman-Long

fs/kernfs/file.c

@@ -1010,7 +1010,7 @@ struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent,
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 	if (key) {
-		lockdep_init_map(&kn->dep_map, "kn->count", key, 0);
+		lockdep_init_map(&kn->dep_map, "kn->active", key, 0);
 		kn->flags |= KERNFS_LOCKDEP;
 	}
 #endif