[PATCH] x86_64 irq: Remove unnecessary irq 0 setup.

The code in io_apic.c and in i8259.c currently hardcode the same
vector for the timer interrupt so there is no reason for a special
assignment for the timer as the setup for the i8259 already takes care
of this.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/x86_64/kernel/i8259.c b/arch/x86_64/kernel/i8259.c
index 01e2cf0..103517d 100644 (file)
--- a/arch/x86_64/kernel/i8259.c
+++ b/arch/x86_64/kernel/i8259.c
@@ -519,12 +519,6 @@ void __init init_IRQ(void)
        }
 
 #ifdef CONFIG_SMP
-       /*
-        * IRQ0 must be given a fixed assignment and initialized,
-        * because it's used before the IO-APIC is set up.
-        */
-       __get_cpu_var(vector_irq)[FIRST_DEVICE_VECTOR] = 0;
-
        /*
         * The reschedule interrupt is a CPU-to-CPU reschedule-helper
         * IPI, driven by wakeup.