ACPICA: Support for custom ACPICA build for ACPI 5 reduced hardware

Add ACPI_REDUCED_HARDWARE flag that removes all hardware-related
code (about 10% code, 5% static data).

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, 32 insertions, 5 deletions

diff --git a/drivers/acpi/acpica/utinit.c b/drivers/acpi/acpica/utinit.c
index 8359c0c5dc98..246798e4c938 100644
--- a/drivers/acpi/acpica/utinit.c
+++ b/drivers/acpi/acpica/utinit.c
@@ -53,27 +53,35 @@ ACPI_MODULE_NAME("utinit")
 /* Local prototypes */
 static void acpi_ut_terminate(void);
 
+#if (!ACPI_REDUCED_HARDWARE)
+
+static void acpi_ut_free_gpe_lists(void);
+
+#else
+
+#define acpi_ut_free_gpe_lists()
+#endif                          /* !ACPI_REDUCED_HARDWARE */
+
+#if (!ACPI_REDUCED_HARDWARE)
 /******************************************************************************
  *
- * FUNCTION:    acpi_ut_terminate
+ * FUNCTION:    acpi_ut_free_gpe_lists
  *
  * PARAMETERS:  none
  *
  * RETURN:      none
  *
- * DESCRIPTION: Free global memory
+ * DESCRIPTION: Free global GPE lists
  *
  ******************************************************************************/
 
-static void acpi_ut_terminate(void)
+static void acpi_ut_free_gpe_lists(void)
 {
         struct acpi_gpe_block_info *gpe_block;
         struct acpi_gpe_block_info *next_gpe_block;
         struct acpi_gpe_xrupt_info *gpe_xrupt_info;
         struct acpi_gpe_xrupt_info *next_gpe_xrupt_info;
 
-        ACPI_FUNCTION_TRACE(ut_terminate);
-
         /* Free global GPE blocks and related info structures */
 
         gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
@@ -91,7 +99,26 @@ static void acpi_ut_terminate(void)
                 ACPI_FREE(gpe_xrupt_info);
                 gpe_xrupt_info = next_gpe_xrupt_info;
         }
+}
+#endif                          /* !ACPI_REDUCED_HARDWARE */
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_terminate
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      none
+ *
+ * DESCRIPTION: Free global memory
+ *
+ ******************************************************************************/
+
+static void acpi_ut_terminate(void)
+{
+        ACPI_FUNCTION_TRACE(ut_terminate);
 
+        acpi_ut_free_gpe_lists();
         acpi_ut_delete_address_lists();
         return_VOID;
 }