From: Eric W. Biederman <ebiederm@xmission.com>
Date: Fri, 23 Feb 2007 11:36:25 +0000 (-0700)
Subject: [PATCH] x86_64 irq: Remove unnecessary irq 0 setup.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b93179bdfcbb0154e63e57194e2648bd0ff648a7;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[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 01e2cf0bdeb1..103517d9f8e6 100644
--- 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.