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>

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 785700a..f489d7a 100644 (file)
--- 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 c50adb8..603261a 100644 (file)
--- 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 9e645cb..b16ef02 100644 (file)
--- 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

diff --git a/include/asm-x86/genapic_32.h b/include/asm-x86/genapic_32.h
index 33a73f5..b02ea6e 100644 (file)
--- a/include/asm-x86/genapic_32.h
+++ b/include/asm-x86/genapic_32.h
@@ -119,10 +119,5 @@ enum uv_system_type {UV_NONE, UV_LEGACY_APIC, UV_X2APIC, UV_NON_UNIQUE_APIC};
 #define is_uv_system()                 0
 #define uv_wakeup_secondary(a, b)      1
 
-#ifdef CONFIG_X86_IO_APIC
-extern void force_mask_ioapic_irq_2(void);
-#else
-static inline void force_mask_ioapic_irq_2(void) { }
-#endif
 
 #endif

diff --git a/include/asm-x86/genapic_64.h b/include/asm-x86/genapic_64.h
index 647e4e5..0f85046 100644 (file)
--- a/include/asm-x86/genapic_64.h
+++ b/include/asm-x86/genapic_64.h
@@ -46,10 +46,4 @@ extern int uv_wakeup_secondary(int phys_apicid, unsigned int start_rip);
 
 extern void setup_apic_routing(void);
 
-#ifdef CONFIG_X86_IO_APIC
-extern void force_mask_ioapic_irq_2(void);
-#else
-static inline void force_mask_ioapic_irq_2(void) { }
-#endif
-
 #endif