x86: Move irq_init to x86_init_ops

irq_init is overridden by x86_quirks and by paravirts. Unify the whole
mess and make it an unconditional x86_init_ops function which defaults
to the standard function and can be overridden by the early platform
code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 files changed, 11 insertions, 42 deletions

diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
index 8fe2782..ddda6cb 100644
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -37,7 +37,6 @@ extern void fixup_irqs(void);
 #endif
 
 extern void (*generic_interrupt_extension)(void);
-extern void init_IRQ(void);
 extern void native_init_IRQ(void);
 extern bool handle_irq(unsigned irq, struct pt_regs *regs);
 
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 6d66896..25922afb 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -201,8 +201,6 @@ struct pv_cpu_ops {
 };
 
 struct pv_irq_ops {
-	void (*init_IRQ)(void);
-
 	/*
 	 * Get/set interrupt state.  save_fl and restore_fl are only
 	 * expected to use X86_EFLAGS_IF; all other bits
diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index 66a3197..404086f 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -16,12 +16,9 @@
 struct x86_quirks {
 	int (*arch_pre_time_init)(void);
 	int (*arch_time_init)(void);
-	int (*arch_intr_init)(void);
 	int (*arch_trap_init)(void);
 };
 
-extern void x86_quirk_intr_init(void);
-
 extern void x86_quirk_trap_init(void);
 
 extern void x86_quirk_pre_time_init(void);
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 65e3394..8d7be65 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -47,9 +47,11 @@ struct x86_init_resources {
  * struct x86_init_irqs - platform specific interrupt setup
  * @pre_vector_init:		init code to run before interrupt vectors
  *				are set up.
+ * @intr_init:			interrupt init code
  */
 struct x86_init_irqs {
 	void (*pre_vector_init)(void);
+	void (*intr_init)(void);
 };
 
 /**
diff --git a/arch/x86/kernel/apic/numaq_32.c b/arch/x86/kernel/apic/numaq_32.c
index ec8b311..eafd341 100644
--- a/arch/x86/kernel/apic/numaq_32.c
+++ b/arch/x86/kernel/apic/numaq_32.c
@@ -265,7 +265,6 @@ static void __init smp_read_mpc_oem(struct mpc_table *mpc)
 static struct x86_quirks numaq_x86_quirks __initdata = {
 	.arch_pre_time_init		= numaq_pre_time_init,
 	.arch_time_init			= NULL,
-	.arch_intr_init			= NULL,
 	.arch_trap_init			= NULL,
 };
 
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index acdf088..e0142cd 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -140,8 +140,10 @@ void __init init_ISA_irqs(void)
 	}
 }
 
-/* Overridden in paravirt.c */
-void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
+void init_IRQ(void)
+{
+	x86_init.irqs.intr_init();
+}
 
 static void __init smp_intr_init(void)
 {
@@ -238,12 +240,6 @@ void __init native_init_IRQ(void)
 
 #ifdef CONFIG_X86_32
 	/*
-	 * Call quirks after call gates are initialised (usually add in
-	 * the architecture specific gates):
-	 */
-	x86_quirk_intr_init();
-
-	/*
 	 * External FPU? Set up irq13 if so, for
 	 * original braindamaged IBM FERR coupling.
 	 */
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 532c9a2..d76bfbe 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -183,11 +183,6 @@ unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
 	return insn_len;
 }
 
-void init_IRQ(void)
-{
-	pv_irq_ops.init_IRQ();
-}
-
 static void native_flush_tlb(void)
 {
 	__native_flush_tlb();
@@ -328,7 +323,6 @@ struct pv_time_ops pv_time_ops = {
 };
 
 struct pv_irq_ops pv_irq_ops = {
-	.init_IRQ = native_init_IRQ,
 	.save_fl = __PV_IS_CALLEE_SAVE(native_save_fl),
 	.restore_fl = __PV_IS_CALLEE_SAVE(native_restore_fl),
 	.irq_disable = __PV_IS_CALLEE_SAVE(native_irq_disable),
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 54043cb..d3da0f7 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1021,23 +1021,6 @@ void __init setup_arch(char **cmdline_p)
 #ifdef CONFIG_X86_32
 
 /**
- * x86_quirk_intr_init - post gate setup interrupt initialisation
- *
- * Description:
- *	Fill in any interrupts that may have been left out by the general
- *	init_IRQ() routine.  interrupts having to do with the machine rather
- *	than the devices on the I/O bus (like APIC interrupts in intel MP
- *	systems) are started here.
- **/
-void __init x86_quirk_intr_init(void)
-{
-	if (x86_quirks->arch_intr_init) {
-		if (x86_quirks->arch_intr_init())
-			return;
-	}
-}
-
-/**
  * x86_quirk_trap_init - initialise system specific traps
  *
  * Description:
diff --git a/arch/x86/kernel/visws_quirks.c b/arch/x86/kernel/visws_quirks.c
index 1d6309d..a490137 100644
--- a/arch/x86/kernel/visws_quirks.c
+++ b/arch/x86/kernel/visws_quirks.c
@@ -228,7 +228,6 @@ static int visws_trap_init(void);
 
 static struct x86_quirks visws_x86_quirks __initdata = {
 	.arch_time_init		= visws_time_init,
-	.arch_intr_init		= NULL,
 	.arch_trap_init		= visws_trap_init,
 };
 
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index f2abe21..8cb5933 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -39,5 +39,6 @@ struct __initdata x86_init_ops x86_init = {
 
 	.irqs = {
 		.pre_vector_init	= init_ISA_irqs,
+		.intr_init		= native_init_IRQ,
 	},
 };
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index 11445c1..1ff98651 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -1262,7 +1262,6 @@ __init void lguest_init(void)
 	 */
 
 	/* Interrupt-related operations */
-	pv_irq_ops.init_IRQ = lguest_init_IRQ;
 	pv_irq_ops.save_fl = PV_CALLEE_SAVE(save_fl);
 	pv_irq_ops.restore_fl = __PV_IS_CALLEE_SAVE(lg_restore_fl);
 	pv_irq_ops.irq_disable = PV_CALLEE_SAVE(irq_disable);
@@ -1325,6 +1324,7 @@ __init void lguest_init(void)
 	pv_time_ops.get_tsc_khz = lguest_tsc_khz;
 
 	x86_init.resources.memory_setup = lguest_memory_setup;
+	x86_init.irqs.intr_init = lguest_init_IRQ;
 
 	/*
 	 * Now is a good time to look at the implementations of these functions
diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c
index cfd1779..9d30105 100644
--- a/arch/x86/xen/irq.c
+++ b/arch/x86/xen/irq.c
@@ -1,5 +1,7 @@
 #include <linux/hardirq.h>
 
+#include <asm/x86_init.h>
+
 #include <xen/interface/xen.h>
 #include <xen/interface/sched.h>
 #include <xen/interface/vcpu.h>
@@ -112,8 +114,6 @@ static void xen_halt(void)
 }
 
 static const struct pv_irq_ops xen_irq_ops __initdata = {
-	.init_IRQ = xen_init_IRQ,
-
 	.save_fl = PV_CALLEE_SAVE(xen_save_fl),
 	.restore_fl = PV_CALLEE_SAVE(xen_restore_fl),
 	.irq_disable = PV_CALLEE_SAVE(xen_irq_disable),
@@ -129,4 +129,5 @@ static const struct pv_irq_ops xen_irq_ops __initdata = {
 void __init xen_init_irq_ops()
 {
 	pv_irq_ops = xen_irq_ops;
+	x86_init.irqs.intr_init = xen_init_IRQ;
 }