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| author | Anton Blanchard <anton@samba.org> | 2010-01-05 18:55:10 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-01-15 13:20:08 +1100 |
| commit | c81b812a333818c5cc1be2e086c8509d853ebeeb (patch) | |
| tree | bb84b805a78e74f2e8aa64f5d946d0659d2a28fb /arch | |
| parent | 46150a050f7a329bf570462dc6df3330cafee926 (diff) | |
| download | linux-3.10-c81b812a333818c5cc1be2e086c8509d853ebeeb.tar.gz linux-3.10-c81b812a333818c5cc1be2e086c8509d853ebeeb.tar.bz2 linux-3.10-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.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h index 22f738d12ad..bbf89701d7a 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); |