1 files changed, 23 insertions, 95 deletions

diff --git a/drivers/acpi/namespace/nsalloc.c b/drivers/acpi/namespace/nsalloc.c
index 9b871f38b61b..dc3f0739a46b 100644
--- a/drivers/acpi/namespace/nsalloc.c
+++ b/drivers/acpi/namespace/nsalloc.c
@@ -47,9 +47,6 @@
 #define _COMPONENT          ACPI_NAMESPACE
 ACPI_MODULE_NAME("nsalloc")
 
-/* Local prototypes */
-static void acpi_ns_remove_reference(struct acpi_namespace_node *node);
-
 /*******************************************************************************
  *
  * FUNCTION:    acpi_ns_create_node
@@ -61,14 +58,13 @@ static void acpi_ns_remove_reference(struct acpi_namespace_node *node);
  * DESCRIPTION: Create a namespace node
  *
  ******************************************************************************/
-
 struct acpi_namespace_node *acpi_ns_create_node(u32 name)
 {
         struct acpi_namespace_node *node;
 
-        ACPI_FUNCTION_TRACE("ns_create_node");
+        ACPI_FUNCTION_TRACE(ns_create_node);
 
-        node = ACPI_MEM_CALLOCATE(sizeof(struct acpi_namespace_node));
+        node = acpi_os_acquire_object(acpi_gbl_namespace_cache);
         if (!node) {
                 return_PTR(NULL);
         }
@@ -76,9 +72,7 @@ struct acpi_namespace_node *acpi_ns_create_node(u32 name)
         ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_allocated++);
 
         node->name.integer = name;
-        node->reference_count = 1;
         ACPI_SET_DESCRIPTOR_TYPE(node, ACPI_DESC_TYPE_NAMED);
-
         return_PTR(node);
 }
 
@@ -100,7 +94,7 @@ void acpi_ns_delete_node(struct acpi_namespace_node *node)
         struct acpi_namespace_node *prev_node;
         struct acpi_namespace_node *next_node;
 
-        ACPI_FUNCTION_TRACE_PTR("ns_delete_node", node);
+        ACPI_FUNCTION_TRACE_PTR(ns_delete_node, node);
 
         parent_node = acpi_ns_get_parent_node(node);
 
@@ -115,6 +109,7 @@ void acpi_ns_delete_node(struct acpi_namespace_node *node)
         }
 
         if (prev_node) {
+
                 /* Node is not first child, unlink it */
 
                 prev_node->peer = next_node->peer;
@@ -125,6 +120,7 @@ void acpi_ns_delete_node(struct acpi_namespace_node *node)
                 /* Node is first child (has no previous peer) */
 
                 if (next_node->flags & ANOBJ_END_OF_PEER_LIST) {
+
                         /* No peers at all */
 
                         parent_node->child = NULL;
@@ -137,10 +133,10 @@ void acpi_ns_delete_node(struct acpi_namespace_node *node)
         ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_freed++);
 
         /*
-         * Detach an object if there is one then delete the node
+         * Detach an object if there is one, then delete the node
          */
         acpi_ns_detach_object(node);
-        ACPI_MEM_FREE(node);
+        (void)acpi_os_release_object(acpi_gbl_namespace_cache, node);
         return_VOID;
 }
 
@@ -171,7 +167,7 @@ void acpi_ns_install_node(struct acpi_walk_state *walk_state, struct acpi_namesp
         acpi_owner_id owner_id = 0;
         struct acpi_namespace_node *child_node;
 
-        ACPI_FUNCTION_TRACE("ns_install_node");
+        ACPI_FUNCTION_TRACE(ns_install_node);
 
         /*
          * Get the owner ID from the Walk state
@@ -216,14 +212,6 @@ void acpi_ns_install_node(struct acpi_walk_state *walk_state, struct acpi_namesp
                           acpi_ut_get_type_name(parent_node->type),
                           parent_node));
 
-        /*
-         * Increment the reference count(s) of all parents up to
-         * the root!
-         */
-        while ((node = acpi_ns_get_parent_node(node)) != NULL) {
-                node->reference_count++;
-        }
-
         return_VOID;
 }
 
@@ -244,10 +232,9 @@ void acpi_ns_delete_children(struct acpi_namespace_node *parent_node)
 {
         struct acpi_namespace_node *child_node;
         struct acpi_namespace_node *next_node;
-        struct acpi_namespace_node *node;
         u8 flags;
 
-        ACPI_FUNCTION_TRACE_PTR("ns_delete_children", parent_node);
+        ACPI_FUNCTION_TRACE_PTR(ns_delete_children, parent_node);
 
         if (!parent_node) {
                 return_VOID;
@@ -264,6 +251,7 @@ void acpi_ns_delete_children(struct acpi_namespace_node *parent_node)
          * Deallocate all children at this level
          */
         do {
+
                 /* Get the things we need */
 
                 next_node = child_node->peer;
@@ -289,26 +277,10 @@ void acpi_ns_delete_children(struct acpi_namespace_node *parent_node)
                  */
                 acpi_ns_detach_object(child_node);
 
-                /*
-                 * Decrement the reference count(s) of all parents up to
-                 * the root! (counts were incremented when the node was created)
-                 */
-                node = child_node;
-                while ((node = acpi_ns_get_parent_node(node)) != NULL) {
-                        node->reference_count--;
-                }
-
-                /* There should be only one reference remaining on this node */
-
-                if (child_node->reference_count != 1) {
-                        ACPI_WARNING((AE_INFO,
-                                      "Existing references (%d) on node being deleted (%p)",
-                                      child_node->reference_count, child_node));
-                }
-
                 /* Now we can delete the node */
 
-                ACPI_MEM_FREE(child_node);
+                (void)acpi_os_release_object(acpi_gbl_namespace_cache,
+                                             child_node);
 
                 /* And move on to the next child in the list */
 
@@ -341,7 +313,7 @@ void acpi_ns_delete_namespace_subtree(struct acpi_namespace_node *parent_node)
         struct acpi_namespace_node *child_node = NULL;
         u32 level = 1;
 
-        ACPI_FUNCTION_TRACE("ns_delete_namespace_subtree");
+        ACPI_FUNCTION_TRACE(ns_delete_namespace_subtree);
 
         if (!parent_node) {
                 return_VOID;
@@ -352,11 +324,14 @@ void acpi_ns_delete_namespace_subtree(struct acpi_namespace_node *parent_node)
          * to where we started.
          */
         while (level > 0) {
+
                 /* Get the next node in this scope (NULL if none) */
 
-                child_node = acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node,
-                                                   child_node);
+                child_node =
+                    acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node,
+                                          child_node);
                 if (child_node) {
+
                         /* Found a child node - detach any attached object */
 
                         acpi_ns_detach_object(child_node);
@@ -401,55 +376,6 @@ void acpi_ns_delete_namespace_subtree(struct acpi_namespace_node *parent_node)
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ns_remove_reference
- *
- * PARAMETERS:  Node           - Named node whose reference count is to be
- *                               decremented
- *
- * RETURN:      None.
- *
- * DESCRIPTION: Remove a Node reference.  Decrements the reference count
- *              of all parent Nodes up to the root.  Any node along
- *              the way that reaches zero references is freed.
- *
- ******************************************************************************/
-
-static void acpi_ns_remove_reference(struct acpi_namespace_node *node)
-{
-        struct acpi_namespace_node *parent_node;
-        struct acpi_namespace_node *this_node;
-
-        ACPI_FUNCTION_ENTRY();
-
-        /*
-         * Decrement the reference count(s) of this node and all
-         * nodes up to the root,  Delete anything with zero remaining references.
-         */
-        this_node = node;
-        while (this_node) {
-                /* Prepare to move up to parent */
-
-                parent_node = acpi_ns_get_parent_node(this_node);
-
-                /* Decrement the reference count on this node */
-
-                this_node->reference_count--;
-
-                /* Delete the node if no more references */
-
-                if (!this_node->reference_count) {
-                        /* Delete all children and delete the node */
-
-                        acpi_ns_delete_children(this_node);
-                        acpi_ns_delete_node(this_node);
-                }
-
-                this_node = parent_node;
-        }
-}
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_ns_delete_namespace_by_owner
  *
  * PARAMETERS:  owner_id    - All nodes with this owner will be deleted
@@ -469,15 +395,15 @@ void acpi_ns_delete_namespace_by_owner(acpi_owner_id owner_id)
         u32 level;
         struct acpi_namespace_node *parent_node;
 
-        ACPI_FUNCTION_TRACE_U32("ns_delete_namespace_by_owner", owner_id);
+        ACPI_FUNCTION_TRACE_U32(ns_delete_namespace_by_owner, owner_id);
 
         if (owner_id == 0) {
                 return_VOID;
         }
 
+        deletion_node = NULL;
         parent_node = acpi_gbl_root_node;
         child_node = NULL;
-        deletion_node = NULL;
         level = 1;
 
         /*
@@ -494,12 +420,14 @@ void acpi_ns_delete_namespace_by_owner(acpi_owner_id owner_id)
                                           child_node);
 
                 if (deletion_node) {
-                        acpi_ns_remove_reference(deletion_node);
+                        acpi_ns_delete_children(deletion_node);
+                        acpi_ns_delete_node(deletion_node);
                         deletion_node = NULL;
                 }
 
                 if (child_node) {
                         if (child_node->owner_id == owner_id) {
+
                                 /* Found a matching child node - detach any attached object */
 
                                 acpi_ns_detach_object(child_node);