[PATCH] x86/PCI: build amd_bus.o only when CONFIG_AMD_NB=y

[Bjorn Helgaas]

We only need amd_bus.o for AMD systems with PCI.  arch/x86/pci/Makefile
already depends on CONFIG_PCI=y, so this patch just adds the dependency
on CONFIG_AMD_NB.

Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: stable@xxxxxxxxxx	# 2.6.34+ (needs adjustment for k8 -> amd rename)
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
---
 arch/x86/pci/Makefile |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/pci/Makefile b/arch/x86/pci/Makefile
index 6b8759f..d24d3da 100644
--- a/arch/x86/pci/Makefile
+++ b/arch/x86/pci/Makefile
@@ -18,8 +18,9 @@ obj-$(CONFIG_X86_NUMAQ)		+= numaq_32.o
 obj-$(CONFIG_X86_MRST)		+= mrst.o
 
 obj-y				+= common.o early.o
-obj-y				+= amd_bus.o bus_numa.o
+obj-y				+= bus_numa.o
 
+obj-$(CONFIG_AMD_NB)		+= amd_bus.o
 obj-$(CONFIG_PCI_CNB20LE_QUIRK)	+= broadcom_bus.o
 
 ifeq ($(CONFIG_PCI_DEBUG),y)

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