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@xxxxxxxxx> --- Index: linux-cpumask/arch/mips/include/asm/mach-ip27/topology.h =================================================================== --- linux-cpumask.orig/arch/mips/include/asm/mach-ip27/topology.h 2010-01-06 15:20:22.872583883 +1100 +++ linux-cpumask/arch/mips/include/asm/mach-ip27/topology.h 2010-01-06 15:20:47.310083709 +1100 @@ -24,7 +24,9 @@ extern struct cpuinfo_ip27 sn_cpu_info[N #define cpu_to_node(cpu) (sn_cpu_info[(cpu)].p_nodeid) #define parent_node(node) (node) -#define cpumask_of_node(node) (&hub_data(node)->h_cpus) +#define cpumask_of_node(node) ((node) == -1 ? \ + cpu_all_mask : \ + &hub_data(node)->h_cpus) struct pci_bus; extern int pcibus_to_node(struct pci_bus *); --
