x86: remove the write-only timer_uses_ioapic_pin_0

This patch removes the write-only timer_uses_ioapic_pin_0
(gsi can't be <= 15 in the line of it's fake usage in mpparse_32.c).

Spotted by the GNU C compiler.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
index 0d70acd..742fab4 100644 (file)
--- a/arch/x86/kernel/io_apic_32.c
+++ b/arch/x86/kernel/io_apic_32.c
@@ -2114,8 +2114,6 @@ static inline void unlock_ExtINT_logic(void)
        ioapic_write_entry(apic, pin, entry0);
 }
 
-int timer_uses_ioapic_pin_0;
-
 /*
  * This code may look a bit paranoid, but it's supposed to cooperate with
  * a wide range of boards and BIOS bugs.  Fortunately only the timer IRQ
@@ -2155,9 +2153,6 @@ static inline void __init check_timer(void)
        pin2  = ioapic_i8259.pin;
        apic2 = ioapic_i8259.apic;
 
-       if (pin1 == 0)
-               timer_uses_ioapic_pin_0 = 1;
-
        printk(KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
                vector, apic1, pin1, apic2, pin2);
 

diff --git a/arch/x86/kernel/mpparse_32.c b/arch/x86/kernel/mpparse_32.c
index 15dd871..15265ee 100644 (file)
--- a/arch/x86/kernel/mpparse_32.c
+++ b/arch/x86/kernel/mpparse_32.c
@@ -1176,8 +1176,7 @@ int mp_register_gsi(u32 gsi, int triggering, int polarity)
                         * So test for this condition, and if necessary, avoid
                         * the pin collision.
                         */
-                       if (gsi > 15 || (gsi == 0 && !timer_uses_ioapic_pin_0))
-                               gsi = pci_irq++;
+                       gsi = pci_irq++;
                        /*
                         * Don't assign IRQ used by ACPI SCI
                         */

diff --git a/include/asm-x86/io_apic.h b/include/asm-x86/io_apic.h
index 0f5b3fe..095e8e3 100644 (file)
--- a/include/asm-x86/io_apic.h
+++ b/include/asm-x86/io_apic.h
@@ -146,7 +146,6 @@ extern int io_apic_get_version(int ioapic);
 extern int io_apic_get_redir_entries(int ioapic);
 extern int io_apic_set_pci_routing(int ioapic, int pin, int irq,
                                   int edge_level, int active_high_low);
-extern int timer_uses_ioapic_pin_0;
 #endif /* CONFIG_ACPI */
 
 extern int (*ioapic_renumber_irq)(int ioapic, int irq);