3 files changed, 1 insertions, 13 deletions
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 7249ba2..aee50b4 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -23,7 +23,6 @@ u8 sleep_states[ACPI_S_STATE_COUNT];
 
 static struct pm_ops acpi_pm_ops;
 
-extern void do_suspend_lowlevel_s4bios(void);
 extern void do_suspend_lowlevel(void);
 
 static u32 acpi_suspend_states[] = {
@@ -98,8 +97,6 @@ static int acpi_pm_enter(suspend_state_t pm_state)
 	case PM_SUSPEND_DISK:
 		if (acpi_pm_ops.pm_disk_mode == PM_DISK_PLATFORM)
 			status = acpi_enter_sleep_state(acpi_state);
-		else
-			do_suspend_lowlevel_s4bios();
 		break;
 	case PM_SUSPEND_MAX:
 		acpi_power_off();
@@ -206,11 +203,6 @@ static int __init acpi_sleep_init(void)
 			printk(" S%d", i);
 		}
 		if (i == ACPI_STATE_S4) {
-			if (acpi_gbl_FACS->S4bios_f) {
-				sleep_states[i] = 1;
-				printk(" S4bios");
-				acpi_pm_ops.pm_disk_mode = PM_DISK_FIRMWARE;
-			}
 			if (sleep_states[i])
 				acpi_pm_ops.pm_disk_mode = PM_DISK_PLATFORM;
 		}
diff --git a/drivers/acpi/sleep/poweroff.c b/drivers/acpi/sleep/poweroff.c
index a5f947d..af7935a 100644
--- a/drivers/acpi/sleep/poweroff.c
+++ b/drivers/acpi/sleep/poweroff.c
@@ -21,9 +21,7 @@ int acpi_sleep_prepare(u32 acpi_state)
 {
 #ifdef CONFIG_ACPI_SLEEP
 	/* do we have a wakeup address for S2 and S3? */
-	/* Here, we support only S4BIOS, those we set the wakeup address */
-	/* S4OS is only supported for now via swsusp.. */
-	if (acpi_state == ACPI_STATE_S3 || acpi_state == ACPI_STATE_S4) {
+	if (acpi_state == ACPI_STATE_S3) {
 		if (!acpi_wakeup_address) {
 			return -EFAULT;
 		}
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
index 09a603f..4696a85 100644
--- a/drivers/acpi/sleep/proc.c
+++ b/drivers/acpi/sleep/proc.c
@@ -25,8 +25,6 @@ static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset)
 	for (i = 0; i <= ACPI_STATE_S5; i++) {
 		if (sleep_states[i]) {
 			seq_printf(seq, "S%d ", i);
-			if (i == ACPI_STATE_S4 && acpi_gbl_FACS->S4bios_f)
-				seq_printf(seq, "S4bios ");
 		}
 	}