[IA64] cpumask_of_node() should handle -1 as a node
authorAnton Blanchard <anton@samba.org>
Wed, 6 Jan 2010 04:55:12 +0000 (15:55 +1100)
committerTony Luck <tony.luck@intel.com>
Wed, 6 Jan 2010 23:47:57 +0000 (15:47 -0800)
commit1d1e9f04216b379000128392b11edd7f5d0ebed1
tree450002f3d4defb270aa150df1dccf123cd3b0844
parentc6f7afaeeda5b3c42ea8d7b27e197d223a04675e
[IA64] 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: Tony Luck <tony.luck@intel.com>
arch/ia64/include/asm/topology.h