sparc: cpumask_of_node() should handle -1 as a node
commite5981fd6d77c63c003cac44ab52da72994e7ead3
authorAnton Blanchard <anton@samba.org>
Wed, 6 Jan 2010 04:55:14 +0000 (6 04:55 +0000)
committerDavid S. Miller <davem@davemloft.net>
Thu, 21 Jan 2010 03:04:42 +0000 (20 19:04 -0800)
tree6eacba7c57e63779eb24f01060d7826bd4c659e7
parent3583cbd951d31517de015eab85eb0b5705bce8a9
sparc: 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: David S. Miller <davem@davemloft.net>
arch/sparc/include/asm/topology_64.h