1 files changed, 0 insertions, 47 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 9c981c4a3644..785700a08e9d 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -84,8 +84,6 @@ int acpi_lapic;
 int acpi_ioapic;
 int acpi_strict;
 
-static int disable_irq0_through_ioapic __initdata;
-
 u8 acpi_sci_flags __initdata;
 int acpi_sci_override_gsi __initdata;
 int acpi_skip_timer_override __initdata;
@@ -982,10 +980,6 @@ void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
         int pin;
         struct mp_config_intsrc mp_irq;
 
-        /* Skip the 8254 timer interrupt (IRQ 0) if requested.  */
-        if (bus_irq == 0 && disable_irq0_through_ioapic)
-                return;
-
         /*
          * Convert 'gsi' to 'ioapic.pin'.
          */
@@ -1052,10 +1046,6 @@ void __init mp_config_acpi_legacy_irqs(void)
         for (i = 0; i < 16; i++) {
                 int idx;
 
-                /* Skip the 8254 timer interrupt (IRQ 0) if requested.  */
-                if (i == 0 && disable_irq0_through_ioapic)
-                        continue;
-
                 for (idx = 0; idx < mp_irq_entries; idx++) {
                         struct mp_config_intsrc *irq = mp_irqs + idx;
 
@@ -1413,17 +1403,6 @@ static int __init force_acpi_ht(const struct dmi_system_id *d)
 }
 
 /*
- * Don't register any I/O APIC entries for the 8254 timer IRQ.
- */
-static int __init
-dmi_disable_irq0_through_ioapic(const struct dmi_system_id *d)
-{
-        pr_notice("%s detected: disabling IRQ 0 through I/O APIC\n", d->ident);
-        disable_irq0_through_ioapic = 1;
-        return 0;
-}
-
-/*
  * Force ignoring BIOS IRQ0 pin2 override
  */
 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
@@ -1608,32 +1587,6 @@ static struct dmi_system_id __initdata acpi_dmi_table[] = {
          * is enabled.  This input is incorrectly designated the
          * ISA IRQ 0 via an interrupt source override even though
          * it is wired to the output of the master 8259A and INTIN0
-         * is not connected at all.  Abandon any attempts to route
-         * IRQ 0 through the I/O APIC therefore.
-         */
-        {
-         .callback = dmi_disable_irq0_through_ioapic,
-         .ident = "HP NX6125 laptop",
-         .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
-                     },
-         },
-        {
-         .callback = dmi_disable_irq0_through_ioapic,
-         .ident = "HP NX6325 laptop",
-         .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
-                     },
-         },
-        /*
-         * HP laptops which use a DSDT reporting as HP/SB400/10000,
-         * which includes some code which overrides all temperature
-         * trip points to 16C if the INTIN2 input of the I/O APIC
-         * is enabled.  This input is incorrectly designated the
-         * ISA IRQ 0 via an interrupt source override even though
-         * it is wired to the output of the master 8259A and INTIN0
          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
          * override in that cases.
          */