[PATCH v7 09/13] x86/init: add intr_mode_init to x86_init_ops

[Dou Liyang <douly.fnst@cn.fujitsu.com>]

X86 and XEN initialize interrupt delivery mode in different way.

Ordinary conditional function calls will make the code mess.

Add an unconditional x86_init_ops function which defaults to the
standard function and can be overridden by the early platform code.

Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
---
 arch/x86/include/asm/x86_init.h | 2 ++
 arch/x86/kernel/apic/apic.c     | 2 +-
 arch/x86/kernel/smpboot.c       | 2 +-
 arch/x86/kernel/x86_init.c      | 1 +
 4 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 7ba7e90..f45acdf 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -50,11 +50,13 @@ struct x86_init_resources {
  *				are set up.
  * @intr_init:			interrupt init code
  * @trap_init:			platform specific trap setup
+ * @intr_mode_init:		interrupt delivery mode setup
  */
 struct x86_init_irqs {
 	void (*pre_vector_init)(void);
 	void (*intr_init)(void);
 	void (*trap_init)(void);
+	void (*intr_mode_init)(void);
 };
 
 /**
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 8b9d778..c5526eb 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2473,7 +2473,7 @@ void __init apic_bsp_setup(bool upmode)
 #ifdef CONFIG_UP_LATE_INIT
 void __init up_late_init(void)
 {
-	apic_intr_mode_init();
+	x86_init.irqs.intr_mode_init();
 
 	if (apic_intr_mode == APIC_PIC)
 		return;
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index f006f07..6045074 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1289,7 +1289,7 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
 
 	set_cpu_sibling_map(0);
 
-	apic_intr_mode_init();
+	x86_init.irqs.intr_mode_init();
 
 	smp_sanity_check();
 
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index a088b2c..a7889b9 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -55,6 +55,7 @@ struct x86_init_ops x86_init __initdata = {
 		.pre_vector_init	= init_ISA_irqs,
 		.intr_init		= native_init_IRQ,
 		.trap_init		= x86_init_noop,
+		.intr_mode_init		= apic_intr_mode_init
 	},
 
 	.oem = {
-- 
2.5.5