ACPICA: Resources: New interface, AcpiWalkResourceBuffer.

Implements a new interface for walking resource lists that it at
a lower level than the existing AcpiWalkResources.  (Method is
not executed.)

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

include/acpi/acpixf.h

@@ -443,6 +443,11 @@ acpi_status
 acpi_get_event_resources(acpi_handle device_handle,
 			 struct acpi_buffer *ret_buffer);
 
+acpi_status
+acpi_walk_resource_buffer(struct acpi_buffer *buffer,
+			  acpi_walk_resource_callback user_function,
+			  void *context);
+
 acpi_status
 acpi_walk_resources(acpi_handle device,
 		    char *name,

include/acpi/actypes.h

@@ -881,6 +881,10 @@ struct acpi_buffer {
 	void *pointer;		/* pointer to buffer */
 };
 
+/* Free a buffer created in an struct acpi_buffer via ACPI_ALLOCATE_LOCAL_BUFFER */
+
+#define ACPI_FREE_BUFFER(b)         ACPI_FREE(b.pointer)
+
 /*
  * name_type for acpi_get_name
  */