x86: I/O APIC: remove an IRQ2-mask hack

Now that IRQ2 is never made available to the I/O APIC, there is no need
to special-case it and mask as a workaround for broken systems.  Actually,
because of the former, mask_IO_APIC_irq(2) is a no-op already.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 0 insertions, 21 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 785700a08e9d..f489d7a9be92 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1409,7 +1409,6 @@ static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
 {
         pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
         acpi_skip_timer_override = 1;
-        force_mask_ioapic_irq_2();
         return 0;
 }
 
diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
index c50adb84ea6f..603261a5885c 100644
--- a/arch/x86/kernel/io_apic_32.c
+++ b/arch/x86/kernel/io_apic_32.c
@@ -59,13 +59,6 @@ static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
 static DEFINE_SPINLOCK(ioapic_lock);
 static DEFINE_SPINLOCK(vector_lock);
 
-static bool mask_ioapic_irq_2 __initdata;
-
-void __init force_mask_ioapic_irq_2(void)
-{
-        mask_ioapic_irq_2 = true;
-}
-
 int timer_through_8259 __initdata;
 
 /*
@@ -2187,9 +2180,6 @@ static inline void __init check_timer(void)
         printk(KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
                 vector, apic1, pin1, apic2, pin2);
 
-        if (mask_ioapic_irq_2)
-                mask_IO_APIC_irq(2);
-
         /*
          * Some BIOS writers are clueless and report the ExtINTA
          * I/O APIC input from the cascaded 8259A as the timer
diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index 9e645cba11c4..b16ef029cf88 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -94,13 +94,6 @@ static int no_timer_check;
 
 static int disable_timer_pin_1 __initdata;
 
-static bool mask_ioapic_irq_2 __initdata;
-
-void __init force_mask_ioapic_irq_2(void)
-{
-        mask_ioapic_irq_2 = true;
-}
-
 int timer_through_8259 __initdata;
 
 /* Where if anywhere is the i8259 connect in external int mode */
@@ -1706,9 +1699,6 @@ static inline void __init check_timer(void)
         apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
                 cfg->vector, apic1, pin1, apic2, pin2);
 
-        if (mask_ioapic_irq_2)
-                mask_IO_APIC_irq(2);
-
         /*
          * Some BIOS writers are clueless and report the ExtINTA
          * I/O APIC input from the cascaded 8259A as the timer