drm/gem: Export drm_gem_lru_move_tail_locked()

Export the locked version or lru's move_tail().

Signed-off-by: Rob Clark <[e-mail]>
Patchwork: https://patchwork.freedesktop.org/patch/527835/
Link: https://lore.kernel.org/r/[e-mail]

drivers/gpu/drm/drm_gem.c

···
 }
 EXPORT_SYMBOL(drm_gem_lru_remove);
 
-static void
+/**
+ * drm_gem_lru_move_tail_locked - move the object to the tail of the LRU
+ *
+ * Like &drm_gem_lru_move_tail but lru lock must be held
+ *
+ * @lru: The LRU to move the object into.
+ * @obj: The GEM object to move into this LRU
+ */
+void
 drm_gem_lru_move_tail_locked(struct drm_gem_lru *lru, struct drm_gem_object *obj)
 {
 	lockdep_assert_held_once(lru->lock);
···
 	list_add_tail(&obj->lru_node, &lru->list);
 	obj->lru = lru;
 }
+EXPORT_SYMBOL(drm_gem_lru_move_tail_locked);
 
 /**
  * drm_gem_lru_move_tail - move the object to the tail of the LRU

include/drm/drm_gem.h

···
 
 void drm_gem_lru_init(struct drm_gem_lru *lru, struct mutex *lock);
 void drm_gem_lru_remove(struct drm_gem_object *obj);
+void drm_gem_lru_move_tail_locked(struct drm_gem_lru *lru, struct drm_gem_object *obj);
 void drm_gem_lru_move_tail(struct drm_gem_lru *lru, struct drm_gem_object *obj);
 unsigned long drm_gem_lru_scan(struct drm_gem_lru *lru, unsigned nr_to_scan,
 			       bool (*shrink)(struct drm_gem_object *obj));