From: tip-bot for Borislav Petkov on
Commit-ID: ade029e2aaacc8965a548b0b0f80c5bee97ffc68
Author: Borislav Petkov <borislav.petkov(a)>
AuthorDate: Sat, 24 Apr 2010 09:56:53 +0200
Committer: H. Peter Anvin <hpa(a)>
CommitDate: Fri, 14 May 2010 11:53:01 -0700

x86, k8: Fix build error when K8_NB is disabled

K8_NB depends on PCI and when the last is disabled (allnoconfig) we fail
at the final linking stage due to missing exported num_k8_northbridges.
Add a header stub for that.

Signed-off-by: Borislav Petkov <borislav.petkov(a)>
LKML-Reference: <20100503183036.GJ26107(a)aftab>
Signed-off-by: H. Peter Anvin <hpa(a)>
Cc: <stable(a)>
arch/x86/include/asm/k8.h | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/k8.h b/arch/x86/include/asm/k8.h
index f70e600..af00bd1 100644
--- a/arch/x86/include/asm/k8.h
+++ b/arch/x86/include/asm/k8.h
@@ -16,11 +16,16 @@ extern int k8_numa_init(unsigned long start_pfn, unsigned long end_pfn);
extern int k8_scan_nodes(void);

#ifdef CONFIG_K8_NB
+extern int num_k8_northbridges;
static inline struct pci_dev *node_to_k8_nb_misc(int node)
return (node < num_k8_northbridges) ? k8_northbridges[node] : NULL;
+#define num_k8_northbridges 0
static inline struct pci_dev *node_to_k8_nb_misc(int node)
return NULL;
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