diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h
index 5de4ec72766d653924068cb6887d07573ef93539..5ccb99ae3a6fae1872a13ab40755aa4ecd693106 100644
--- a/drivers/acpi/acpica/achware.h
+++ b/drivers/acpi/acpica/achware.h
@@ -83,22 +83,22 @@ acpi_status acpi_hw_clear_acpi_status(void);
 /*
  * hwsleep - sleep/wake support (Legacy sleep registers)
  */
-acpi_status acpi_hw_legacy_sleep(u8 sleep_state);
+acpi_status acpi_hw_legacy_sleep(u8 sleep_state, u8 flags);
 
-acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state);
+acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state, u8 flags);
 
-acpi_status acpi_hw_legacy_wake(u8 sleep_state);
+acpi_status acpi_hw_legacy_wake(u8 sleep_state, u8 flags);
 
 /*
  * hwesleep - sleep/wake support (Extended FADT-V5 sleep registers)
  */
 void acpi_hw_execute_sleep_method(char *method_name, u32 integer_argument);
 
-acpi_status acpi_hw_extended_sleep(u8 sleep_state);
+acpi_status acpi_hw_extended_sleep(u8 sleep_state, u8 flags);
 
-acpi_status acpi_hw_extended_wake_prep(u8 sleep_state);
+acpi_status acpi_hw_extended_wake_prep(u8 sleep_state, u8 flags);
 
-acpi_status acpi_hw_extended_wake(u8 sleep_state);
+acpi_status acpi_hw_extended_wake(u8 sleep_state, u8 flags);
 
 /*
  * hwvalid - Port I/O with validation
diff --git a/drivers/acpi/acpica/hwesleep.c b/drivers/acpi/acpica/hwesleep.c
index 6cbc4e10bfa896ae8e71289851ba51c60fdaf19b..1c409e82c461fc1076d020c6b5df4247f35b8f49 100644
--- a/drivers/acpi/acpica/hwesleep.c
+++ b/drivers/acpi/acpica/hwesleep.c
@@ -103,6 +103,7 @@ void acpi_hw_execute_sleep_method(char *method_pathname, u32 integer_argument)
  * FUNCTION:    acpi_hw_extended_sleep
  *
  * PARAMETERS:  sleep_state         - Which sleep state to enter
+ *              Flags               - ACPI_EXECUTE_GTS to run optional method
  *
  * RETURN:      Status
  *
@@ -112,7 +113,7 @@ void acpi_hw_execute_sleep_method(char *method_pathname, u32 integer_argument)
  *
  ******************************************************************************/
 
-acpi_status acpi_hw_extended_sleep(u8 sleep_state)
+acpi_status acpi_hw_extended_sleep(u8 sleep_state, u8 flags)
 {
 	acpi_status status;
 	u8 sleep_type_value;
@@ -136,9 +137,11 @@ acpi_status acpi_hw_extended_sleep(u8 sleep_state)
 
 	acpi_gbl_system_awake_and_running = FALSE;
 
-	/* Execute the _GTS method (Going To Sleep) */
+	/* Optionally execute _GTS (Going To Sleep) */
 
-	acpi_hw_execute_sleep_method(METHOD_PATHNAME__GTS, sleep_state);
+	if (flags & ACPI_EXECUTE_GTS) {
+		acpi_hw_execute_sleep_method(METHOD_PATHNAME__GTS, sleep_state);
+	}
 
 	/* Flush caches, as per ACPI specification */
 
@@ -181,6 +184,7 @@ acpi_status acpi_hw_extended_sleep(u8 sleep_state)
  * FUNCTION:    acpi_hw_extended_wake_prep
  *
  * PARAMETERS:  sleep_state         - Which sleep state we just exited
+ *              Flags               - ACPI_EXECUTE_BFS to run optional method
  *
  * RETURN:      Status
  *
@@ -189,7 +193,7 @@ acpi_status acpi_hw_extended_sleep(u8 sleep_state)
  *
  ******************************************************************************/
 
-acpi_status acpi_hw_extended_wake_prep(u8 sleep_state)
+acpi_status acpi_hw_extended_wake_prep(u8 sleep_state, u8 flags)
 {
 	acpi_status status;
 	u8 sleep_type_value;
@@ -208,7 +212,11 @@ acpi_status acpi_hw_extended_wake_prep(u8 sleep_state)
 				 &acpi_gbl_FADT.sleep_control);
 	}
 
-	acpi_hw_execute_sleep_method(METHOD_PATHNAME__BFS, sleep_state);
+	/* Optionally execute _BFS (Back From Sleep) */
+
+	if (flags & ACPI_EXECUTE_BFS) {
+		acpi_hw_execute_sleep_method(METHOD_PATHNAME__BFS, sleep_state);
+	}
 	return_ACPI_STATUS(AE_OK);
 }
 
@@ -217,6 +225,7 @@ acpi_status acpi_hw_extended_wake_prep(u8 sleep_state)
  * FUNCTION:    acpi_hw_extended_wake
  *
  * PARAMETERS:  sleep_state         - Which sleep state we just exited
+ *              Flags               - Reserved, set to zero
  *
  * RETURN:      Status
  *
@@ -225,7 +234,7 @@ acpi_status acpi_hw_extended_wake_prep(u8 sleep_state)
  *
  ******************************************************************************/
 
-acpi_status acpi_hw_extended_wake(u8 sleep_state)
+acpi_status acpi_hw_extended_wake(u8 sleep_state, u8 flags)
 {
 	ACPI_FUNCTION_TRACE(hw_extended_wake);
 
diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c
index aba36349ba4d1fcefdb1fa489521098859f9bef8..8ab325cefa68a4eea8be1c1c320c5e8c2ceffbc3 100644
--- a/drivers/acpi/acpica/hwsleep.c
+++ b/drivers/acpi/acpica/hwsleep.c
@@ -56,6 +56,7 @@ ACPI_MODULE_NAME("hwsleep")
  * FUNCTION:    acpi_hw_legacy_sleep
  *
  * PARAMETERS:  sleep_state         - Which sleep state to enter
+ *              Flags               - ACPI_EXECUTE_GTS to run optional method
  *
  * RETURN:      Status
  *
@@ -63,7 +64,7 @@ ACPI_MODULE_NAME("hwsleep")
  *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
  *
  ******************************************************************************/
-acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
+acpi_status acpi_hw_legacy_sleep(u8 sleep_state, u8 flags)
 {
 	struct acpi_bit_register_info *sleep_type_reg_info;
 	struct acpi_bit_register_info *sleep_enable_reg_info;
@@ -121,9 +122,11 @@ acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
 		return_ACPI_STATUS(status);
 	}
 
-	/* Execute the _GTS method (Going To Sleep) */
+	/* Optionally execute _GTS (Going To Sleep) */
 
-	acpi_hw_execute_sleep_method(METHOD_PATHNAME__GTS, sleep_state);
+	if (flags & ACPI_EXECUTE_GTS) {
+		acpi_hw_execute_sleep_method(METHOD_PATHNAME__GTS, sleep_state);
+	}
 
 	/* Get current value of PM1A control */
 
@@ -219,6 +222,7 @@ acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
  * FUNCTION:    acpi_hw_legacy_wake_prep
  *
  * PARAMETERS:  sleep_state         - Which sleep state we just exited
+ *              Flags               - ACPI_EXECUTE_BFS to run optional method
  *
  * RETURN:      Status
  *
@@ -228,7 +232,7 @@ acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
  *
  ******************************************************************************/
 
-acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
+acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state, u8 flags)
 {
 	acpi_status status;
 	struct acpi_bit_register_info *sleep_type_reg_info;
@@ -279,7 +283,11 @@ acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
 		}
 	}
 
-	acpi_hw_execute_sleep_method(METHOD_PATHNAME__BFS, sleep_state);
+	/* Optionally execute _BFS (Back From Sleep) */
+
+	if (flags & ACPI_EXECUTE_BFS) {
+		acpi_hw_execute_sleep_method(METHOD_PATHNAME__BFS, sleep_state);
+	}
 	return_ACPI_STATUS(status);
 }
 
@@ -288,6 +296,7 @@ acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
  * FUNCTION:    acpi_hw_legacy_wake
  *
  * PARAMETERS:  sleep_state         - Which sleep state we just exited
+ *              Flags               - Reserved, set to zero
  *
  * RETURN:      Status
  *
@@ -296,7 +305,7 @@ acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
  *
  ******************************************************************************/
 
-acpi_status acpi_hw_legacy_wake(u8 sleep_state)
+acpi_status acpi_hw_legacy_wake(u8 sleep_state, u8 flags)
 {
 	acpi_status status;
 
diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c
index cf0168e538d9ddca8fb3f1d73203e137a8d63863..762d059bb508af7bd05f14829beea233e039bfd8 100644
--- a/drivers/acpi/acpica/hwxfsleep.c
+++ b/drivers/acpi/acpica/hwxfsleep.c
@@ -49,15 +49,16 @@
 ACPI_MODULE_NAME("hwxfsleep")
 
 /* Local prototypes */
-static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id);
+static acpi_status
+acpi_hw_sleep_dispatch(u8 sleep_state, u8 flags, u32 function_id);
 
 /*
  * Dispatch table used to efficiently branch to the various sleep
  * functions.
  */
-#define ACPI_SLEEP_FUNCTION         0
-#define ACPI_WAKE_PREP_FUNCTION     1
-#define ACPI_WAKE_FUNCTION          2
+#define ACPI_SLEEP_FUNCTION_ID         0
+#define ACPI_WAKE_PREP_FUNCTION_ID     1
+#define ACPI_WAKE_FUNCTION_ID          2
 
 /* Legacy functions are optional, based upon ACPI_REDUCED_HARDWARE */
 
@@ -233,7 +234,8 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
  *              function.
  *
  ******************************************************************************/
-static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id)
+static acpi_status
+acpi_hw_sleep_dispatch(u8 sleep_state, u8 flags, u32 function_id)
 {
 	acpi_status status;
 	struct acpi_sleep_functions *sleep_functions =
@@ -246,11 +248,11 @@ static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id)
 	 * use the extended sleep registers
 	 */
 	if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
-		status = sleep_functions->extended_function(sleep_state);
+		status = sleep_functions->extended_function(sleep_state, flags);
 	} else {
 		/* Legacy sleep */
 
-		status = sleep_functions->legacy_function(sleep_state);
+		status = sleep_functions->legacy_function(sleep_state, flags);
 	}
 
 	return (status);
@@ -260,7 +262,7 @@ static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id)
 	 * For the case where reduced-hardware-only code is being generated,
 	 * we know that only the extended sleep registers are available
 	 */
-	status = sleep_functions->extended_function(sleep_state);
+	status = sleep_functions->extended_function(sleep_state, flags);
 	return (status);
 
 #endif				/* !ACPI_REDUCED_HARDWARE */
@@ -290,8 +292,6 @@ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
 
 	ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
 
-	/* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
-
 	status = acpi_get_sleep_type_data(sleep_state,
 					  &acpi_gbl_sleep_type_a,
 					  &acpi_gbl_sleep_type_b);
@@ -349,6 +349,7 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
  * FUNCTION:    acpi_enter_sleep_state
  *
  * PARAMETERS:  sleep_state         - Which sleep state to enter
+ *              Flags               - ACPI_EXECUTE_GTS to run optional method
  *
  * RETURN:      Status
  *
@@ -356,7 +357,7 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
  *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
  *
  ******************************************************************************/
-acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
+acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state, u8 flags)
 {
 	acpi_status status;
 
@@ -369,7 +370,8 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
 		return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
 	}
 
-	status = acpi_hw_sleep_dispatch(sleep_state, ACPI_SLEEP_FUNCTION);
+	status =
+	    acpi_hw_sleep_dispatch(sleep_state, flags, ACPI_SLEEP_FUNCTION_ID);
 	return_ACPI_STATUS(status);
 }
 
@@ -380,6 +382,7 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
  * FUNCTION:    acpi_leave_sleep_state_prep
  *
  * PARAMETERS:  sleep_state         - Which sleep state we are exiting
+ *              Flags               - ACPI_EXECUTE_BFS to run optional method
  *
  * RETURN:      Status
  *
@@ -388,13 +391,15 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
  *              Called with interrupts DISABLED.
  *
  ******************************************************************************/
-acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
+acpi_status acpi_leave_sleep_state_prep(u8 sleep_state, u8 flags)
 {
 	acpi_status status;
 
 	ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
 
-	status = acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_PREP_FUNCTION);
+	status =
+	    acpi_hw_sleep_dispatch(sleep_state, flags,
+				   ACPI_WAKE_PREP_FUNCTION_ID);
 	return_ACPI_STATUS(status);
 }
 
@@ -419,7 +424,7 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
 	ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
 
 
-	status = acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_FUNCTION);
+	status = acpi_hw_sleep_dispatch(sleep_state, 0, ACPI_WAKE_FUNCTION_ID);
 	return_ACPI_STATUS(status);
 }
 
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 4fda549fa599963e052a47b29cb452f09830986e..8f1fb4520d24840659178174822e5d78018bd394 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -250,7 +250,8 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
 	switch (acpi_state) {
 	case ACPI_STATE_S1:
 		barrier();
-		status = acpi_enter_sleep_state(acpi_state);
+		status = acpi_enter_sleep_state(acpi_state,
+				ACPI_NO_OPTIONAL_METHODS);
 		break;
 
 	case ACPI_STATE_S3:
@@ -265,7 +266,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
 	acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
 
 	/* Reprogram control registers and execute _BFS */
-	acpi_leave_sleep_state_prep(acpi_state);
+	acpi_leave_sleep_state_prep(acpi_state, ACPI_NO_OPTIONAL_METHODS);
 
 	/* ACPI 3.0 specs (P62) says that it's the responsibility
 	 * of the OSPM to clear the status bit [ implying that the
@@ -534,9 +535,9 @@ static int acpi_hibernation_enter(void)
 	ACPI_FLUSH_CPU_CACHE();
 
 	/* This shouldn't return.  If it returns, we have a problem */
-	status = acpi_enter_sleep_state(ACPI_STATE_S4);
+	status = acpi_enter_sleep_state(ACPI_STATE_S4, ACPI_NO_OPTIONAL_METHODS);
 	/* Reprogram control registers and execute _BFS */
-	acpi_leave_sleep_state_prep(ACPI_STATE_S4);
+	acpi_leave_sleep_state_prep(ACPI_STATE_S4, ACPI_NO_OPTIONAL_METHODS);
 
 	return ACPI_SUCCESS(status) ? 0 : -EFAULT;
 }
@@ -549,7 +550,7 @@ static void acpi_hibernation_leave(void)
 	 */
 	acpi_enable();
 	/* Reprogram control registers and execute _BFS */
-	acpi_leave_sleep_state_prep(ACPI_STATE_S4);
+	acpi_leave_sleep_state_prep(ACPI_STATE_S4, ACPI_NO_OPTIONAL_METHODS);
 	/* Check the hardware signature */
 	if (facs && s4_hardware_signature != facs->hardware_signature) {
 		printk(KERN_EMERG "ACPI: Hardware changed while hibernated, "
@@ -773,7 +774,7 @@ static void acpi_power_off(void)
 	/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
 	printk(KERN_DEBUG "%s called\n", __func__);
 	local_irq_disable();
-	acpi_enter_sleep_state(ACPI_STATE_S5);
+	acpi_enter_sleep_state(ACPI_STATE_S5, ACPI_NO_OPTIONAL_METHODS);
 }
 
 /*
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index fb8a238115d68bca3ae746333a57ec8acd1802a7..488c986ebe44667bd69fe032aa3c4abbb9f41288 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -486,11 +486,11 @@ acpi_get_sleep_type_data(u8 sleep_state, u8 * slp_typ_a, u8 * slp_typ_b);
 
 acpi_status acpi_enter_sleep_state_prep(u8 sleep_state);
 
-acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state);
+acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state, u8 flags);
 
 ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void))
 
-acpi_status acpi_leave_sleep_state_prep(u8 sleep_state);
+acpi_status acpi_leave_sleep_state_prep(u8 sleep_state, u8 flags);
 
 acpi_status acpi_leave_sleep_state(u8 sleep_state);
 
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 349615833a4a0c996dc75e5e35dc5cb3023d3df3..eba66043cf1b7d1dccfc1956446ea9bafdbb588c 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -517,6 +517,13 @@ typedef u64 acpi_integer;
 #define ACPI_SLEEP_TYPE_MAX             0x7
 #define ACPI_SLEEP_TYPE_INVALID         0xFF
 
+/*
+ * Sleep/Wake flags
+ */
+#define ACPI_NO_OPTIONAL_METHODS        0x00	/* Do not execute any optional methods */
+#define ACPI_EXECUTE_GTS                0x01	/* For enter sleep interface */
+#define ACPI_EXECUTE_BFS                0x02	/* For leave sleep prep interface */
+
 /*
  * Standard notify values
  */
@@ -790,7 +797,7 @@ typedef u8 acpi_adr_space_type;
 
 /* Sleep function dispatch */
 
-typedef acpi_status(*ACPI_SLEEP_FUNCTION) (u8 sleep_state);
+typedef acpi_status(*ACPI_SLEEP_FUNCTION) (u8 sleep_state, u8 flags);
 
 struct acpi_sleep_functions {
 	ACPI_SLEEP_FUNCTION legacy_function;