[PATCH] x86-64: 64bit ACPI wakeup trampoline

[~andy/linux] / arch / x86_64 / kernel / acpi / sleep.c

diff --git a/arch/x86_64/kernel/acpi/sleep.c b/arch/x86_64/kernel/acpi/sleep.c
index 091bc79c888f6dac8873c1f420d42f17c390351f..195b7034a148d9f529e9520afe6bdada7ffe80a9 100644 (file)
--- a/arch/x86_64/kernel/acpi/sleep.c
+++ b/arch/x86_64/kernel/acpi/sleep.c
@@ -26,7 +26,6 @@
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  */
 
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/types.h>
@@ -59,18 +58,7 @@ unsigned long acpi_wakeup_address = 0;
 unsigned long acpi_video_flags;
 extern char wakeup_start, wakeup_end;
 
-extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
-
-static pgd_t low_ptr;
-
-static void init_low_mapping(void)
-{
-       pgd_t *slot0 = pgd_offset(current->mm, 0UL);
-       low_ptr = *slot0;
-       set_pgd(slot0, *pgd_offset(current->mm, PAGE_OFFSET));
-       WARN_ON(num_online_cpus() != 1);
-       local_flush_tlb();
-}
+extern unsigned long acpi_copy_wakeup_routine(unsigned long);
 
 /**
  * acpi_save_state_mem - save kernel state
@@ -80,8 +68,6 @@ static void init_low_mapping(void)
  */
 int acpi_save_state_mem(void)
 {
-       init_low_mapping();
-
        memcpy((void *)acpi_wakeup_address, &wakeup_start,
               &wakeup_end - &wakeup_start);
        acpi_copy_wakeup_routine(acpi_wakeup_address);
@@ -94,8 +80,6 @@ int acpi_save_state_mem(void)
  */
 void acpi_restore_state_mem(void)
 {
-       set_pgd(pgd_offset(current->mm, 0UL), low_ptr);
-       local_flush_tlb();
 }
 
 /**
@@ -108,10 +92,11 @@ void acpi_restore_state_mem(void)
  */
 void __init acpi_reserve_bootmem(void)
 {
-       acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE);
-       if ((&wakeup_end - &wakeup_start) > PAGE_SIZE)
+       acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE*2);
+       if ((&wakeup_end - &wakeup_start) > (PAGE_SIZE*2))
                printk(KERN_CRIT
-                      "ACPI: Wakeup code way too big, will crash on attempt to suspend\n");
+                      "ACPI: Wakeup code way too big, will crash on attempt"
+                      " to suspend\n");
 }
 
 static int __init acpi_sleep_setup(char *str)