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[IA64] 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: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Anton Blanchard 2010-01-06 15:55:12 +11:00 committed by Tony Luck
parent c6f7afaeed
commit 1d1e9f0421
1 changed files with 3 additions and 1 deletions
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4
arch/ia64/include/asm/topology.h
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@ -33,7 +33,9 @@
/*
* Returns a bitmask of CPUs on Node 'node'.
*/
#define cpumask_of_node(node) (&node_to_cpu_mask[node])
#define cpumask_of_node(node) ((node) == -1 ? \
cpu_all_mask : \
&node_to_cpu_mask[node])
/*
* Returns the number of the node containing Node 'nid'.