memory tier: rename destroy_memory_type() to put_memory_type()

It appears that destroy_memory_type() isn't a very good name because we
usually will not free the memory_type here.  So rename it to a more
appropriate name i.e.  put_memory_type().

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Miaohe Lin <[email protected]>
Suggested-by: Huang, Ying <[email protected]>
Reviewed-by: "Huang, Ying" <[email protected]>
Reviewed-by: Xiao Yang <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Dave Jiang <[email protected]>
Cc: Vishal Verma <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: MiaoheLin

drivers/dax/kmem.c

@@ -264,7 +264,7 @@ static int __init dax_kmem_init(void)
 	return rc;
 
 error_dax_driver:
-	destroy_memory_type(dax_slowmem_type);
+	put_memory_type(dax_slowmem_type);
 err_dax_slowmem_type:
 	kfree_const(kmem_name);
 	return rc;
@@ -275,7 +275,7 @@ static void __exit dax_kmem_exit(void)
 	dax_driver_unregister(&device_dax_kmem_driver);
 	if (!any_hotremove_failed)
 		kfree_const(kmem_name);
-	destroy_memory_type(dax_slowmem_type);
+	put_memory_type(dax_slowmem_type);
 }
 
 MODULE_AUTHOR("Intel Corporation");

include/linux/memory-tiers.h

@@ -33,7 +33,7 @@ struct memory_dev_type {
 #ifdef CONFIG_NUMA
 extern bool numa_demotion_enabled;
 struct memory_dev_type *alloc_memory_type(int adistance);
-void destroy_memory_type(struct memory_dev_type *memtype);
+void put_memory_type(struct memory_dev_type *memtype);
 void init_node_memory_type(int node, struct memory_dev_type *default_type);
 void clear_node_memory_type(int node, struct memory_dev_type *memtype);
 #ifdef CONFIG_MIGRATION
@@ -68,7 +68,7 @@ static inline struct memory_dev_type *alloc_memory_type(int adistance)
 	return NULL;
 }
 
-static inline void destroy_memory_type(struct memory_dev_type *memtype)
+static inline void put_memory_type(struct memory_dev_type *memtype)
 {
 
 }

mm/memory-tiers.c

@@ -560,11 +560,11 @@ struct memory_dev_type *alloc_memory_type(int adistance)
 }
 EXPORT_SYMBOL_GPL(alloc_memory_type);
 
-void destroy_memory_type(struct memory_dev_type *memtype)
+void put_memory_type(struct memory_dev_type *memtype)
 {
 	kref_put(&memtype->kref, release_memtype);
 }
-EXPORT_SYMBOL_GPL(destroy_memory_type);
+EXPORT_SYMBOL_GPL(put_memory_type);
 
 void init_node_memory_type(int node, struct memory_dev_type *memtype)
 {
@@ -586,7 +586,7 @@ void clear_node_memory_type(int node, struct memory_dev_type *memtype)
 	 */
 	if (!node_memory_types[node].map_count) {
 		node_memory_types[node].memtype = NULL;
-		destroy_memory_type(memtype);
+		put_memory_type(memtype);
 	}
 	mutex_unlock(&memory_tier_lock);
 }