[PATCH] remove ACPI S4bios support

Remove S4BIOS support.  It is pretty useless, and only ever worked for _me_
once.  (I do not think anyone else ever tried it).  It was in feature-removal
for a long time, and it should have been removed before.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

5 files changed, 1 insertions, 27 deletions

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 5f95d4b3cab1..784e08c1c80a 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -17,14 +17,6 @@ Who:	Greg Kroah-Hartman <greg@kroah.com>
 
 ---------------------------
 
-What:   ACPI S4bios support
-When:   May 2005
-Why:    Noone uses it, and it probably does not work, anyway. swsusp is
-        faster, more reliable, and people are actually using it.
-Who:    Pavel Machek <pavel@suse.cz>
-
----------------------------
-
 What:   io_remap_page_range() (macro or function)
 When:   September 2005
 Why:    Replaced by io_remap_pfn_range() which allows more memory space
diff --git a/arch/i386/kernel/acpi/wakeup.S b/arch/i386/kernel/acpi/wakeup.S
index 44d886c745ec..7c74fe0dc93c 100644
--- a/arch/i386/kernel/acpi/wakeup.S
+++ b/arch/i386/kernel/acpi/wakeup.S
@@ -304,12 +304,6 @@ ret_point:
         call    restore_processor_state
         ret
 
-ENTRY(do_suspend_lowlevel_s4bios)
-        call save_processor_state
-        call save_registers
-        call acpi_enter_sleep_state_s4bios
-        ret
-
 ALIGN
 # saved registers
 saved_gdt:      .long   0,0
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 7249ba2b7a27..aee50b453265 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 a5f947de879b..af7935a95bcc 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 09a603f3523e..4696a85a98b9 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 ");
                 }
         }