diff options
Diffstat (limited to 'arch/x86_64/kernel/acpi/sleep.c')
| -rw-r--r-- | arch/x86_64/kernel/acpi/sleep.c | 24 |
1 files changed, 4 insertions, 20 deletions
diff --git a/arch/x86_64/kernel/acpi/sleep.c b/arch/x86_64/kernel/acpi/sleep.c index e1548fbe95a..195b7034a14 100644 --- a/arch/x86_64/kernel/acpi/sleep.c +++ b/arch/x86_64/kernel/acpi/sleep.c @@ -60,19 +60,6 @@ extern char wakeup_start, wakeup_end; extern unsigned long 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; - /* FIXME: We're playing with the current task's page tables here, which - * is potentially dangerous on SMP systems. - */ - set_pgd(slot0, *pgd_offset(current->mm, PAGE_OFFSET)); - local_flush_tlb(); -} - /** * acpi_save_state_mem - save kernel state * @@ -81,8 +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); @@ -95,8 +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(); } /** @@ -109,10 +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) |