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authorAlexey Starikovskiy <astarikovskiy@suse.de>2010-05-26 11:53:07 +0800
committerLen Brown <len.brown@intel.com>2010-07-06 22:33:56 -0400
commitc45b5c097001480e66d4c523eb715ad317a4ef77 (patch)
tree5b9415840b97a724537273db99b2c66975c63347 /drivers/acpi/acpica/nsnames.c
parent5821f75421aa7c7bafdec291223153597f649934 (diff)
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>
Diffstat (limited to 'drivers/acpi/acpica/nsnames.c')
-rw-r--r--drivers/acpi/acpica/nsnames.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/acpi/acpica/nsnames.c b/drivers/acpi/acpica/nsnames.c
index 7dea0031605c..d3104af57e13 100644
--- a/drivers/acpi/acpica/nsnames.c
+++ b/drivers/acpi/acpica/nsnames.c
@@ -93,7 +93,7 @@ acpi_ns_build_external_path(struct acpi_namespace_node *node,
/* Put the name into the buffer */
ACPI_MOVE_32_TO_32((name_buffer + index), &parent_node->name);
- parent_node = acpi_ns_get_parent_node(parent_node);
+ parent_node = parent_node->parent;
/* Prefix name with the path separator */
@@ -198,7 +198,7 @@ acpi_size acpi_ns_get_pathname_length(struct acpi_namespace_node *node)
return 0;
}
size += ACPI_PATH_SEGMENT_LENGTH;
- next_node = acpi_ns_get_parent_node(next_node);
+ next_node = next_node->parent;
}
if (!size) {