Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f8c9bfe4 authored by Bob Moore's avatar Bob Moore Committed by Rafael J. Wysocki
Browse files

ACPICA: Add root node optimization to internal get namespace node function. 



Detect a request for the root node (a lone backslash) up front
before invoking a full namespace lookup.

Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 04a81dce

drivers/acpi/acpica/nsutils.c

+9 −0
Original line number Diff line number Diff line
@@ -671,6 +671,8 @@ acpi_ns_get_node(struct acpi_namespace_node *prefix_node, 


	ACPI_FUNCTION_TRACE_PTR(ns_get_node, ACPI_CAST_PTR(char, pathname));



	/* Simplest case is a null pathname */



	if (!pathname) {

		*return_node = prefix_node;

		if (!prefix_node) {
@@ -679,6 +681,13 @@ acpi_ns_get_node(struct acpi_namespace_node *prefix_node, 
		return_ACPI_STATUS(AE_OK);

	}



	/* Quick check for a reference to the root */



	if (ACPI_IS_ROOT_PREFIX(pathname[0]) && (!pathname[1])) {

		*return_node = acpi_gbl_root_node;

		return_ACPI_STATUS(AE_OK);

	}



	/* Convert path to internal representation */



	status = acpi_ns_internalize_name(pathname, &internal_path);