x86: Move pre_intr_init to x86_init_ops

Replace the quirk machinery by a x86_init_ops function which
defaults to the standard implementation. This is also a preparatory
patch for Moorestown support which needs to replace the default
init_ISA_irqs as well.

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

7 files changed, 22 insertions, 31 deletions

diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
index f38481bcd45..8fe2782a253 100644
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -47,4 +47,6 @@ extern unsigned int do_IRQ(struct pt_regs *regs);
 extern DECLARE_BITMAP(used_vectors, NR_VECTORS);
 extern int vector_used_by_percpu_irq(unsigned int vector);
 
+extern void init_ISA_irqs(void);
+
 #endif /* _ASM_X86_IRQ_H */
diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index 345a2551af9..66a319709d6 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -16,7 +16,6 @@
 struct x86_quirks {
         int (*arch_pre_time_init)(void);
         int (*arch_time_init)(void);
-        int (*arch_pre_intr_init)(void);
         int (*arch_intr_init)(void);
         int (*arch_trap_init)(void);
 };
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index e0d4729c905..65e3394c77f 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -44,12 +44,22 @@ 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.
+ */
+struct x86_init_irqs {
+        void (*pre_vector_init)(void);
+};
+
+/**
  * struct x86_init_ops - functions for platform specific setup
  *
  */
 struct x86_init_ops {
         struct x86_init_resources       resources;
         struct x86_init_mpparse         mpparse;
+        struct x86_init_irqs            irqs;
 };
 
 extern struct x86_init_ops x86_init;
diff --git a/arch/x86/kernel/apic/numaq_32.c b/arch/x86/kernel/apic/numaq_32.c
index 3dd5fd76534..ec8b3113716 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_pre_intr_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 92b7703d3d5..acdf088c758 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -116,7 +116,7 @@ int vector_used_by_percpu_irq(unsigned int vector)
         return 0;
 }
 
-static void __init init_ISA_irqs(void)
+void __init init_ISA_irqs(void)
 {
         int i;
 
@@ -213,32 +213,12 @@ static void __init apic_intr_init(void)
 #endif
 }
 
-/**
- * x86_quirk_pre_intr_init - initialisation prior to setting up interrupt vectors
- *
- * Description:
- *      Perform any necessary interrupt initialisation prior to setting up
- *      the "ordinary" interrupt call gates.  For legacy reasons, the ISA
- *      interrupts should be initialised here if the machine emulates a PC
- *      in any way.
- **/
-static void __init x86_quirk_pre_intr_init(void)
-{
-#ifdef CONFIG_X86_32
-        if (x86_quirks->arch_pre_intr_init) {
-                if (x86_quirks->arch_pre_intr_init())
-                        return;
-        }
-#endif
-        init_ISA_irqs();
-}
-
 void __init native_init_IRQ(void)
 {
         int i;
 
         /* Execute any quirks before the call gates are initialised: */
-        x86_quirk_pre_intr_init();
+        x86_init.irqs.pre_vector_init();
 
         apic_intr_init();
 
diff --git a/arch/x86/kernel/visws_quirks.c b/arch/x86/kernel/visws_quirks.c
index 31e828118f8..1d6309d70df 100644
--- a/arch/x86/kernel/visws_quirks.c
+++ b/arch/x86/kernel/visws_quirks.c
@@ -73,14 +73,10 @@ static int __init visws_time_init(void)
         return 0;
 }
 
-static int __init visws_pre_intr_init(void)
+/* Replaces the default init_ISA_irqs in the generic setup */
+static void __init visws_pre_intr_init(void)
 {
         init_VISWS_APIC_irqs();
-
-        /*
-         * We dont want ISA irqs to be set up by the generic code:
-         */
-        return 1;
 }
 
 /* Quirk for machine specific memory setup. */
@@ -232,7 +228,6 @@ static int visws_trap_init(void);
 
 static struct x86_quirks visws_x86_quirks __initdata = {
         .arch_time_init         = visws_time_init,
-        .arch_pre_intr_init     = visws_pre_intr_init,
         .arch_intr_init         = NULL,
         .arch_trap_init         = visws_trap_init,
 };
@@ -257,6 +252,7 @@ void __init visws_early_detect(void)
         x86_init.resources.memory_setup = visws_memory_setup;
         x86_init.mpparse.get_smp_config = visws_get_smp_config;
         x86_init.mpparse.find_smp_config = visws_find_smp_config;
+        x86_init.irqs.pre_vector_init = visws_pre_intr_init;
 
         /*
          * Install reboot quirks:
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 3488fb62ac0..f2abe2136da 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -9,6 +9,7 @@
 #include <asm/mpspec.h>
 #include <asm/setup.h>
 #include <asm/e820.h>
+#include <asm/irq.h>
 
 void __cpuinit x86_init_noop(void) { }
 void __init x86_init_uint_noop(unsigned int unused) { }
@@ -35,4 +36,8 @@ struct __initdata x86_init_ops x86_init = {
                 .find_smp_config        = default_find_smp_config,
                 .get_smp_config         = default_get_smp_config,
         },
+
+        .irqs = {
+                .pre_vector_init        = init_ISA_irqs,
+        },
 };