ACPICA: Re-implement interpreters' "serialized mode"
Enhanced the implementation of the interpreters'
serialized mode (boot with "acpi_serialize" to set
acpi_glb_all_methods_serialized flag.)
When this mode is specified, instead of creating a serialization
semaphore per control method, the interpreter lock is
simply no longer released before a blocking operation
during control method execution. This effectively makes
the AML Interpreter single-threaded. The overhead of a
semaphore per-method is eliminated.
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c
index dca6799..6a0a46e 100644
--- a/drivers/acpi/namespace/nsxfeval.c
+++ b/drivers/acpi/namespace/nsxfeval.c
@@ -170,7 +170,6 @@
struct acpi_buffer *return_buffer)
{
acpi_status status;
- acpi_status status2;
struct acpi_evaluate_info *info;
acpi_size buffer_space_needed;
u32 i;
@@ -329,14 +328,12 @@
* Delete the internal return object. NOTE: Interpreter must be
* locked to avoid race condition.
*/
- status2 = acpi_ex_enter_interpreter();
- if (ACPI_SUCCESS(status2)) {
+ acpi_ex_enter_interpreter();
- /* Remove one reference on the return object (should delete it) */
+ /* Remove one reference on the return object (should delete it) */
- acpi_ut_remove_reference(info->return_object);
- acpi_ex_exit_interpreter();
- }
+ acpi_ut_remove_reference(info->return_object);
+ acpi_ex_exit_interpreter();
}
cleanup: