ACPICA: Performance enhancement for namespace search and access

This change enhances the performance of namespace searches and
walks by adding a backpointer to the parent in each namespace
node. On large namespaces, this change can improve overall ACPI
performance by up to 9X.  Adding a pointer to each namespace node
increases the overall size of the internal namespace by about 5%,
since each namespace entry usually consists of both a namespace
node and an ACPI operand object.

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/acpi/acpica/dsmthdat.c b/drivers/acpi/acpica/dsmthdat.c
index d5e927f818a0..8095306fcd8c 100644
--- a/drivers/acpi/acpica/dsmthdat.c
+++ b/drivers/acpi/acpica/dsmthdat.c
@@ -102,8 +102,7 @@ void acpi_ds_method_data_init(struct acpi_walk_state *walk_state)
                 walk_state->arguments[i].name.integer |= (i << 24);
                 walk_state->arguments[i].descriptor_type = ACPI_DESC_TYPE_NAMED;
                 walk_state->arguments[i].type = ACPI_TYPE_ANY;
-                walk_state->arguments[i].flags =
-                    ANOBJ_END_OF_PEER_LIST | ANOBJ_METHOD_ARG;
+                walk_state->arguments[i].flags = ANOBJ_METHOD_ARG;
         }
 
         /* Init the method locals */
@@ -116,8 +115,7 @@ void acpi_ds_method_data_init(struct acpi_walk_state *walk_state)
                 walk_state->local_variables[i].descriptor_type =
                     ACPI_DESC_TYPE_NAMED;
                 walk_state->local_variables[i].type = ACPI_TYPE_ANY;
-                walk_state->local_variables[i].flags =
-                    ANOBJ_END_OF_PEER_LIST | ANOBJ_METHOD_LOCAL;
+                walk_state->local_variables[i].flags = ANOBJ_METHOD_LOCAL;
         }
 
         return_VOID;