2 files changed, 17 insertions, 12 deletions

diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index 240a0a5e2b31..d7d46cb53e52 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -169,6 +169,7 @@ extern void mask_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
 extern int restore_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
 
 extern void setup_ioapic_ids_from_mpc(void);
+extern void setup_ioapic_ids_from_mpc_nocheck(void);
 
 struct mp_ioapic_gsi{
         u32 gsi_base;
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index ce3c6fb4f357..4f026a632c95 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1934,8 +1934,7 @@ void disable_IO_APIC(void)
  *
  * by Matt Domsch <Matt_Domsch@dell.com>  Tue Dec 21 12:25:05 CST 1999
  */
-
-void __init setup_ioapic_ids_from_mpc(void)
+void __init setup_ioapic_ids_from_mpc_nocheck(void)
 {
         union IO_APIC_reg_00 reg_00;
         physid_mask_t phys_id_present_map;
@@ -1944,15 +1943,6 @@ void __init setup_ioapic_ids_from_mpc(void)
         unsigned char old_id;
         unsigned long flags;
 
-        if (acpi_ioapic)
-                return;
-        /*
-         * Don't check I/O APIC IDs for xAPIC systems.  They have
-         * no meaning without the serial APIC bus.
-         */
-        if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
-                || APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
-                return;
         /*
          * This is broken; anything with a real cpu count has to
          * circumvent this idiocy regardless.
@@ -2006,7 +1996,6 @@ void __init setup_ioapic_ids_from_mpc(void)
                         physids_or(phys_id_present_map, phys_id_present_map, tmp);
                 }
 
-
                 /*
                  * We need to adjust the IRQ routing table
                  * if the ID changed.
@@ -2042,6 +2031,21 @@ void __init setup_ioapic_ids_from_mpc(void)
                         apic_printk(APIC_VERBOSE, " ok.\n");
         }
 }
+
+void __init setup_ioapic_ids_from_mpc(void)
+{
+
+        if (acpi_ioapic)
+                return;
+        /*
+         * Don't check I/O APIC IDs for xAPIC systems.  They have
+         * no meaning without the serial APIC bus.
+         */
+        if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+                || APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
+                return;
+        setup_ioapic_ids_from_mpc_nocheck();
+}
 #endif
 
 int no_timer_check __initdata;