[PATCH] add 'for_each_pci_dev()' helper macro

Jeff already mistakenly sent in a user of this macro, so we should
probably add the macro itself too.
Signed-off-by: Hanna Linder <hannal@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/pci.h

@@ -547,6 +547,7 @@ struct pci_dev {
 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
 #define	to_pci_dev(n) container_of(n, struct pci_dev, dev)
+#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
 
 /*
  *  For PCI devices, the region numbers are assigned this way: