ACPICA: Unload operator: Emit a warning if and when it is ever used.

We would like to see the ASL for any machine that uses this operator,
so emit at least a warning to hopefully draw some attention.

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>

diff --git a/drivers/acpi/acpica/exconfig.c b/drivers/acpi/acpica/exconfig.c
index 8ba1464..1b734eb 100644 (file)
--- a/drivers/acpi/acpica/exconfig.c
+++ b/drivers/acpi/acpica/exconfig.c
@@ -576,6 +576,13 @@ acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
        ACPI_FUNCTION_TRACE(ex_unload_table);
 
        /*
+        * Temporarily emit a warning so that the ASL for the machine can be
+        * hopefully obtained. This is to say that the Unload() operator is
+        * extremely rare if not completely unused.
+        */
+       ACPI_WARNING((AE_INFO, "Received request to unload an ACPI table"));
+
+       /*
         * Validate the handle
         * Although the handle is partially validated in acpi_ex_reconfiguration()
         * when it calls acpi_ex_resolve_operands(), the handle is more completely