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/executer/exsystem.c b/drivers/acpi/executer/exsystem.c
index 3b9736a..7e5aeb1 100644
--- a/drivers/acpi/executer/exsystem.c
+++ b/drivers/acpi/executer/exsystem.c
@@ -66,7 +66,6 @@
acpi_status acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout)
{
acpi_status status;
- acpi_status status2;
ACPI_FUNCTION_TRACE(ex_system_wait_semaphore);
@@ -79,7 +78,7 @@
/* We must wait, so unlock the interpreter */
- acpi_ex_exit_interpreter();
+ acpi_ex_relinquish_interpreter();
status = acpi_os_wait_semaphore(semaphore, 1, timeout);
@@ -89,13 +88,7 @@
/* Reacquire the interpreter */
- status2 = acpi_ex_enter_interpreter();
- if (ACPI_FAILURE(status2)) {
-
- /* Report fatal error, could not acquire interpreter */
-
- return_ACPI_STATUS(status2);
- }
+ acpi_ex_reacquire_interpreter();
}
return_ACPI_STATUS(status);
@@ -119,7 +112,6 @@
acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout)
{
acpi_status status;
- acpi_status status2;
ACPI_FUNCTION_TRACE(ex_system_wait_mutex);
@@ -132,7 +124,7 @@
/* We must wait, so unlock the interpreter */
- acpi_ex_exit_interpreter();
+ acpi_ex_relinquish_interpreter();
status = acpi_os_acquire_mutex(mutex, timeout);
@@ -142,13 +134,7 @@
/* Reacquire the interpreter */
- status2 = acpi_ex_enter_interpreter();
- if (ACPI_FAILURE(status2)) {
-
- /* Report fatal error, could not acquire interpreter */
-
- return_ACPI_STATUS(status2);
- }
+ acpi_ex_reacquire_interpreter();
}
return_ACPI_STATUS(status);
@@ -209,20 +195,18 @@
acpi_status acpi_ex_system_do_suspend(acpi_integer how_long)
{
- acpi_status status;
-
ACPI_FUNCTION_ENTRY();
/* Since this thread will sleep, we must release the interpreter */
- acpi_ex_exit_interpreter();
+ acpi_ex_relinquish_interpreter();
acpi_os_sleep(how_long);
/* And now we must get the interpreter again */
- status = acpi_ex_enter_interpreter();
- return (status);
+ acpi_ex_reacquire_interpreter();
+ return (AE_OK);
}
/*******************************************************************************