6 files changed, 30 insertions, 12 deletions

diff --git a/drivers/acpi/dispatcher/dswload.c b/drivers/acpi/dispatcher/dswload.c
index 565d4557d0e0..4ed08680ae7c 100644
--- a/drivers/acpi/dispatcher/dswload.c
+++ b/drivers/acpi/dispatcher/dswload.c
@@ -756,9 +756,9 @@ acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
                 flags = ACPI_NS_NO_UPSEARCH;
                 if (walk_state->pass_number == 3) {
 
-                        /* Execution mode, node cannot already exist */
+                        /* Execution mode, node cannot already exist, node is temporary */
 
-                        flags |= ACPI_NS_ERROR_IF_FOUND;
+                        flags |= (ACPI_NS_ERROR_IF_FOUND | ACPI_NS_TEMPORARY);
                 }
 
                 /* Add new entry or lookup existing entry */
diff --git a/drivers/acpi/namespace/nsdump.c b/drivers/acpi/namespace/nsdump.c
index da88834f55e7..ec5ce59acb98 100644
--- a/drivers/acpi/namespace/nsdump.c
+++ b/drivers/acpi/namespace/nsdump.c
@@ -226,6 +226,12 @@ acpi_ns_dump_one_object(acpi_handle obj_handle,
         obj_desc = acpi_ns_get_attached_object(this_node);
         acpi_dbg_level = dbg_level;
 
+        /* Temp nodes are those nodes created by a control method */
+
+        if (this_node->flags & ANOBJ_TEMPORARY) {
+                acpi_os_printf("(T) ");
+        }
+
         switch (info->display_type & ACPI_DISPLAY_MASK) {
         case ACPI_DISPLAY_SUMMARY:
 
@@ -623,7 +629,8 @@ acpi_ns_dump_objects(acpi_object_type type,
         info.display_type = display_type;
 
         (void)acpi_ns_walk_namespace(type, start_handle, max_depth,
-                                     ACPI_NS_WALK_NO_UNLOCK,
+                                     ACPI_NS_WALK_NO_UNLOCK |
+                                     ACPI_NS_WALK_TEMP_NODES,
                                      acpi_ns_dump_one_object, (void *)&info,
                                      NULL);
 }
diff --git a/drivers/acpi/namespace/nssearch.c b/drivers/acpi/namespace/nssearch.c
index 566f0a4aff93..d261c9bcd450 100644
--- a/drivers/acpi/namespace/nssearch.c
+++ b/drivers/acpi/namespace/nssearch.c
@@ -402,6 +402,10 @@ acpi_ns_search_and_enter(u32 target_name,
         }
 #endif
 
+        if (flags & ACPI_NS_TEMPORARY) {
+                new_node->flags |= ANOBJ_TEMPORARY;
+        }
+
         /* Install the new object into the parent's list of children */
 
         acpi_ns_install_node(walk_state, node, new_node, type);
diff --git a/drivers/acpi/namespace/nswalk.c b/drivers/acpi/namespace/nswalk.c
index c8f6bef16ed0..a138fcb832a3 100644
--- a/drivers/acpi/namespace/nswalk.c
+++ b/drivers/acpi/namespace/nswalk.c
@@ -126,7 +126,7 @@ struct acpi_namespace_node *acpi_ns_get_next_node(acpi_object_type type,
  * PARAMETERS:  Type                - acpi_object_type to search for
  *              start_node          - Handle in namespace where search begins
  *              max_depth           - Depth to which search is to reach
- *              unlock_before_callback- Whether to unlock the NS before invoking
+ *              Flags               - Whether to unlock the NS before invoking
  *                                    the callback routine
  *              user_function       - Called when an object of "Type" is found
  *              Context             - Passed to user function
@@ -153,7 +153,7 @@ acpi_status
 acpi_ns_walk_namespace(acpi_object_type type,
                        acpi_handle start_node,
                        u32 max_depth,
-                       u8 unlock_before_callback,
+                       u32 flags,
                        acpi_walk_callback user_function,
                        void *context, void **return_value)
 {
@@ -201,12 +201,15 @@ acpi_ns_walk_namespace(acpi_object_type type,
                                 child_type = child_node->type;
                         }
 
-                        if (child_type == type) {
+                        if ((child_type == type) &&
+                            (!(child_node->flags & ANOBJ_TEMPORARY) ||
+                             (child_node->flags & ANOBJ_TEMPORARY)
+                             && (flags & ACPI_NS_WALK_TEMP_NODES))) {
                                 /*
                                  * Found a matching node, invoke the user
                                  * callback function
                                  */
-                                if (unlock_before_callback) {
+                                if (flags & ACPI_NS_WALK_UNLOCK) {
                                         mutex_status =
                                             acpi_ut_release_mutex
                                             (ACPI_MTX_NAMESPACE);
@@ -219,7 +222,7 @@ acpi_ns_walk_namespace(acpi_object_type type,
                                 status = user_function(child_node, level,
                                                        context, return_value);
 
-                                if (unlock_before_callback) {
+                                if (flags & ACPI_NS_WALK_UNLOCK) {
                                         mutex_status =
                                             acpi_ut_acquire_mutex
                                             (ACPI_MTX_NAMESPACE);
diff --git a/include/acpi/aclocal.h b/include/acpi/aclocal.h
index 553763d7312a..287da6fe256c 100644
--- a/include/acpi/aclocal.h
+++ b/include/acpi/aclocal.h
@@ -204,7 +204,7 @@ struct acpi_namespace_node {
 /* Namespace Node flags */
 
 #define ANOBJ_END_OF_PEER_LIST          0x01    /* End-of-list, Peer field points to parent */
-#define ANOBJ_RESERVED                  0x02    /* Available for future use */
+#define ANOBJ_TEMPORARY                 0x02    /* Node is create by a method and is temporary */
 #define ANOBJ_METHOD_ARG                0x04    /* Node is a method argument */
 #define ANOBJ_METHOD_LOCAL              0x08    /* Node is a method local */
 #define ANOBJ_SUBTREE_HAS_INI           0x10    /* Used to optimize device initialization */
diff --git a/include/acpi/acnamesp.h b/include/acpi/acnamesp.h
index b3b9f0ec79c3..19a61292af60 100644
--- a/include/acpi/acnamesp.h
+++ b/include/acpi/acnamesp.h
@@ -65,9 +65,13 @@
 #define ACPI_NS_ERROR_IF_FOUND      0x08
 #define ACPI_NS_PREFIX_IS_SCOPE     0x10
 #define ACPI_NS_EXTERNAL            0x20
+#define ACPI_NS_TEMPORARY           0x40
 
-#define ACPI_NS_WALK_UNLOCK         TRUE
-#define ACPI_NS_WALK_NO_UNLOCK      FALSE
+/* Flags for acpi_ns_walk_namespace */
+
+#define ACPI_NS_WALK_NO_UNLOCK      0
+#define ACPI_NS_WALK_UNLOCK         0x01
+#define ACPI_NS_WALK_TEMP_NODES     0x02
 
 /*
  * nsinit - Namespace initialization
@@ -92,7 +96,7 @@ acpi_status
 acpi_ns_walk_namespace(acpi_object_type type,
                        acpi_handle start_object,
                        u32 max_depth,
-                       u8 unlock_before_callback,
+                       u32 flags,
                        acpi_walk_callback user_function,
                        void *context, void **return_value);