PCI: add busn_res in struct pci_bus

This adds a busn_res resource in struct pci_bus.  This will replace the
secondary/subordinate members and will be used to build a bus number
resource tree to help with bus number allocation.

[bhelgaas: changelog]
CC: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/pci.h b/include/linux/pci.h
index d8c379dba6ad..ba7c5cd314b7 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -419,6 +419,7 @@ struct pci_bus {
         struct list_head slots;         /* list of slots on this bus */
         struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
         struct list_head resources;     /* address space routed to this bus */
+        struct resource busn_res;       /* bus numbers routed to this bus */
 
         struct pci_ops  *ops;           /* configuration access functions */
         void            *sysdata;       /* hook for sys-specific extension */