3 files changed, 43 insertions, 35 deletions

diff --git a/arch/x86/kernel/irqinit_32.c b/arch/x86/kernel/irqinit_32.c
index c56496f8c6fc..ddf3eb72f864 100644
--- a/arch/x86/kernel/irqinit_32.c
+++ b/arch/x86/kernel/irqinit_32.c
@@ -120,28 +120,8 @@ int vector_used_by_percpu_irq(unsigned int vector)
         return 0;
 }
 
-/* Overridden in paravirt.c */
-void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
-
-void __init native_init_IRQ(void)
+static void __init smp_intr_init(void)
 {
-        int i;
-
-        /* all the set up before the call gates are initialised */
-        pre_intr_init_hook();
-
-        /*
-         * Cover the whole vector space, no vector can escape
-         * us. (some of these will be overridden and become
-         * 'special' SMP interrupts)
-         */
-        for (i =  FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) {
-                /* SYSCALL_VECTOR was reserved in trap_init. */
-                if (i != SYSCALL_VECTOR)
-                        set_intr_gate(i, interrupt[i-FIRST_EXTERNAL_VECTOR]);
-        }
-
-
 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_SMP)
         /*
          * The reschedule interrupt is a CPU-to-CPU reschedule-helper
@@ -170,8 +150,13 @@ void __init native_init_IRQ(void)
         set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
         set_bit(IRQ_MOVE_CLEANUP_VECTOR, used_vectors);
 #endif
+}
 
+static void __init apic_intr_init(void)
+{
 #ifdef CONFIG_X86_LOCAL_APIC
+        smp_intr_init();
+
         /* self generated IPI for local APIC timer */
         alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
 
@@ -181,12 +166,37 @@ void __init native_init_IRQ(void)
 # ifdef CONFIG_PERF_COUNTERS
         alloc_intr_gate(LOCAL_PERF_VECTOR, perf_counter_interrupt);
 # endif
-#endif
 
-#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_MCE_P4THERMAL)
+# ifdef CONFIG_X86_MCE_P4THERMAL
         /* thermal monitor LVT interrupt */
         alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
+# endif
 #endif
+}
+
+/* Overridden in paravirt.c */
+void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
+
+void __init native_init_IRQ(void)
+{
+        int i;
+
+        /* all the set up before the call gates are initialised */
+        pre_intr_init_hook();
+
+        apic_intr_init();
+
+        /*
+         * Cover the whole vector space, no vector can escape
+         * us. (some of these will be overridden and become
+         * 'special' SMP interrupts)
+         */
+        for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
+                int vector = FIRST_EXTERNAL_VECTOR + i;
+                /* SYSCALL_VECTOR was reserved in trap_init. */
+                if (!test_bit(vector, used_vectors))
+                        set_intr_gate(vector, interrupt[i]);
+        }
 
         if (!acpi_ioapic)
                 setup_irq(2, &irq2);
diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 6a71bfc51e51..16e1fc687504 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -162,6 +162,9 @@ void __init native_init_IRQ(void)
         int i;
 
         init_ISA_irqs();
+
+        apic_intr_init();
+
         /*
          * Cover the whole vector space, no vector can escape
          * us. (some of these will be overridden and become
@@ -169,12 +172,10 @@ void __init native_init_IRQ(void)
          */
         for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
                 int vector = FIRST_EXTERNAL_VECTOR + i;
-                if (vector != IA32_SYSCALL_VECTOR)
+                if (!test_bit(vector, used_vectors))
                         set_intr_gate(vector, interrupt[i]);
         }
 
-        apic_intr_init();
-
         if (!acpi_ioapic)
                 setup_irq(2, &irq2);
 }
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index ed5aee5f3fcc..d36a502d87ab 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -979,8 +979,13 @@ void __init trap_init(void)
 #endif
         set_intr_gate(19, &simd_coprocessor_error);
 
+        /* Reserve all the builtin and the syscall vector: */
+        for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
+                set_bit(i, used_vectors);
+
 #ifdef CONFIG_IA32_EMULATION
         set_system_intr_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
+        set_bit(IA32_SYSCALL_VECTOR, used_vectors);
 #endif
 
 #ifdef CONFIG_X86_32
@@ -997,17 +1002,9 @@ void __init trap_init(void)
         }
 
         set_system_trap_gate(SYSCALL_VECTOR, &system_call);
-#endif
-
-        /* Reserve all the builtin and the syscall vector: */
-        for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
-                set_bit(i, used_vectors);
-
-#ifdef CONFIG_X86_64
-        set_bit(IA32_SYSCALL_VECTOR, used_vectors);
-#else
         set_bit(SYSCALL_VECTOR, used_vectors);
 #endif
+
         /*
          * Should be a barrier for any external CPU state:
          */