Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

arch/i386/pci/acpi.c

@@ -0,0 +1,53 @@
+#include <linux/pci.h>
+#include <linux/acpi.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <asm/hw_irq.h>
+#include "pci.h"
+
+struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
+{
+	if (domain != 0) {
+		printk(KERN_WARNING "PCI: Multiple domains not supported\n");
+		return NULL;
+	}
+
+	return pcibios_scan_root(busnum);
+}
+
+extern int pci_routeirq;
+static int __init pci_acpi_init(void)
+{
+	struct pci_dev *dev = NULL;
+
+	if (pcibios_scanned)
+		return 0;
+
+	if (acpi_noirq)
+		return 0;
+
+	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
+	acpi_irq_penalty_init();
+	pcibios_scanned++;
+	pcibios_enable_irq = acpi_pci_irq_enable;
+
+	if (pci_routeirq) {
+		/*
+		 * PCI IRQ routing is set up by pci_enable_device(), but we
+		 * also do it here in case there are still broken drivers that
+		 * don't use pci_enable_device().
+		 */
+		printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
+		while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL)
+			acpi_pci_irq_enable(dev);
+	} else
+		printk(KERN_INFO "PCI: If a device doesn't work, try \"pci=routeirq\".  If it helps, post a report\n");
+
+#ifdef CONFIG_X86_IO_APIC
+	if (acpi_ioapic)
+		print_IO_APIC();
+#endif
+
+	return 0;
+}
+subsys_initcall(pci_acpi_init);