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authorAnton Blanchard <anton@samba.org>2010-01-05 19:55:10 +0100
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-01-15 03:20:08 +0100
commitc81b812a333818c5cc1be2e086c8509d853ebeeb (patch)
treebb84b805a78e74f2e8aa64f5d946d0659d2a28fb /arch
parentpowerpc/pseries: Fix dlpar compile warning without CONFIG_PROC_DEVICETREE (diff)
downloadlinux-c81b812a333818c5cc1be2e086c8509d853ebeeb.tar.xz
linux-c81b812a333818c5cc1be2e086c8509d853ebeeb.zip
powerpc: cpumask_of_node() should handle -1 as a node
pcibus_to_node can return -1 if we cannot determine which node a pci bus is on. If passed -1, cpumask_of_node will negatively index the lookup array and pull in random data: # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpus 00000000,00000003,00000000,00000000 # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpulist 64-65 Change cpumask_of_node to check for -1 and return cpu_all_mask in this case: # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpus ffffffff,ffffffff,ffffffff,ffffffff # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpulist 0-127 Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/include/asm/topology.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h
index 22f738d12ad9..bbf89701d7a4 100644
--- a/arch/powerpc/include/asm/topology.h
+++ b/arch/powerpc/include/asm/topology.h
@@ -17,7 +17,9 @@ static inline int cpu_to_node(int cpu)
#define parent_node(node) (node)
-#define cpumask_of_node(node) (&numa_cpumask_lookup_table[node])
+#define cpumask_of_node(node) ((node) == -1 ? \
+ cpu_all_mask : \
+ &numa_cpumask_lookup_table[node])
int of_node_to_nid(struct device_node *device);