joel16/android_kernel_sony_msm8994_rework
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sparc: cpumask_of_node() should handle -1 as a node

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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: David S. Miller <davem@davemloft.net>
This commit is contained in:
Anton Blanchard 2010-01-06 04:55:14 +00:00 committed by David S. Miller
parent 3583cbd951
commit e5981fd6d7
1 changed files with 3 additions and 1 deletions
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4
arch/sparc/include/asm/topology_64.h
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@ -12,7 +12,9 @@ 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])
struct pci_bus;
#ifdef CONFIG_PCI