Add a flag in bus_type, so we can quickly identify the bus type.
Only adds limited bus types currently.

---

 2.6-root/drivers/ide/ide.c        |    1 +
 2.6-root/drivers/pci/pci-driver.c |    1 +
 2.6-root/drivers/pnp/driver.c     |    1 +
 2.6-root/include/linux/device.h   |    9 +++++++++
 4 files changed, 12 insertions(+)

diff -puN include/linux/device.h~devcore-addflag include/linux/device.h
--- 2.6/include/linux/device.h~devcore-addflag	2004-11-09 12:16:58.000000000 +0800
+++ 2.6-root/include/linux/device.h	2004-11-09 14:43:13.000000000 +0800
@@ -47,8 +47,17 @@ struct class;
 struct class_device;
 struct class_simple;
 
+enum bus_types {
+	BUS_TYPE_PCI = 1,
+	BUS_TYPE_IDE,
+	BUS_TYPE_PLATFORM,
+	BUS_TYPE_PNP,
+	/* TBD: add more */
+};
+
 struct bus_type {
 	char			* name;
+	enum bus_types		type;
 
 	struct subsystem	subsys;
 	struct kset		drivers;
diff -puN drivers/pci/pci-driver.c~devcore-addflag drivers/pci/pci-driver.c
--- 2.6/drivers/pci/pci-driver.c~devcore-addflag	2004-11-09 12:19:13.000000000 +0800
+++ 2.6-root/drivers/pci/pci-driver.c	2004-11-09 12:19:58.000000000 +0800
@@ -532,6 +532,7 @@ int pci_hotplug (struct device *dev, cha
 
 struct bus_type pci_bus_type = {
 	.name		= "pci",
+	.type		= BUS_TYPE_PCI,
 	.match		= pci_bus_match,
 	.hotplug	= pci_hotplug,
 	.suspend	= pci_device_suspend,
diff -puN drivers/ide/ide.c~devcore-addflag drivers/ide/ide.c
--- 2.6/drivers/ide/ide.c~devcore-addflag	2004-11-09 12:20:55.000000000 +0800
+++ 2.6-root/drivers/ide/ide.c	2004-11-09 12:21:30.000000000 +0800
@@ -2414,6 +2414,7 @@ EXPORT_SYMBOL(ide_lock);
 
 struct bus_type ide_bus_type = {
 	.name		= "ide",
+	.type		= BUS_TYPE_IDE,
 	.suspend	= generic_ide_suspend,
 	.resume		= generic_ide_resume,
 };
diff -puN drivers/pnp/driver.c~devcore-addflag drivers/pnp/driver.c
--- 2.6/drivers/pnp/driver.c~devcore-addflag	2004-11-09 14:52:31.000000000 +0800
+++ 2.6-root/drivers/pnp/driver.c	2004-11-09 14:53:10.000000000 +0800
@@ -156,6 +156,7 @@ static int pnp_bus_match(struct device *
 
 struct bus_type pnp_bus_type = {
 	.name	= "pnp",
+	.type	= BUS_TYPE_PNP,
 	.match	= pnp_bus_match,
 };
 
_