pci, x86/io-apic: Allow PCI_IOAPIC to be user configurable on x86

This adjusts PCI_IOAPIC to be user configurable (possibly as a
module) on x86, since the base architecture code for adding
IO-APICs dynamically isn't there yet (and hence having the code
present everywhere is pretty pointless).

To make this consistent, a MODULE_DEVICE_TABLE() declaration
gets added, the class specifications get corrected (by properly
using PCI_DEVICE_CLASS() intended for purposes like this), and
the probe and remove functions get their sections adjusted.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Link: http://lkml.kernel.org/r/4EDDD71A02000078000659F1@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 9 insertions, 10 deletions

diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index f02b5235056d..37856f7c7781 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -98,11 +98,11 @@ config PCI_PASID
           If unsure, say N.
 
 config PCI_IOAPIC
-        bool
+        tristate "PCI IO-APIC hotplug support" if X86
         depends on PCI
         depends on ACPI
         depends on HOTPLUG
-        default y
+        default !X86
 
 config PCI_LABEL
         def_bool y if (DMI || ACPI)
diff --git a/drivers/pci/ioapic.c b/drivers/pci/ioapic.c
index 5775638ac017..205af8dc83c2 100644
--- a/drivers/pci/ioapic.c
+++ b/drivers/pci/ioapic.c
@@ -17,7 +17,7 @@
  */
 
 #include <linux/pci.h>
-#include <linux/export.h>
+#include <linux/module.h>
 #include <linux/acpi.h>
 #include <linux/slab.h>
 #include <acpi/acpi_bus.h>
@@ -27,7 +27,7 @@ struct ioapic {
         u32             gsi_base;
 };
 
-static int ioapic_probe(struct pci_dev *dev, const struct pci_device_id *ent)
+static int __devinit ioapic_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 {
         acpi_handle handle;
         acpi_status status;
@@ -88,7 +88,7 @@ exit_free:
         return -ENODEV;
 }
 
-static void ioapic_remove(struct pci_dev *dev)
+static void __devexit ioapic_remove(struct pci_dev *dev)
 {
         struct ioapic *ioapic = pci_get_drvdata(dev);
 
@@ -99,13 +99,12 @@ static void ioapic_remove(struct pci_dev *dev)
 }
 
 
-static struct pci_device_id ioapic_devices[] = {
-        { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
-          PCI_CLASS_SYSTEM_PIC_IOAPIC << 8, 0xffff00, },
-        { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
-          PCI_CLASS_SYSTEM_PIC_IOXAPIC << 8, 0xffff00, },
+static DEFINE_PCI_DEVICE_TABLE(ioapic_devices) = {
+        { PCI_DEVICE_CLASS(PCI_CLASS_SYSTEM_PIC_IOAPIC, ~0) },
+        { PCI_DEVICE_CLASS(PCI_CLASS_SYSTEM_PIC_IOXAPIC, ~0) },
         { }
 };
+MODULE_DEVICE_TABLE(pci, ioapic_devices);
 
 static struct pci_driver ioapic_driver = {
         .name           = "ioapic",