• Anton Blanchard's avatar
    powerpc: cpumask_of_node() should handle -1 as a node · c81b812a
    Anton Blanchard authored
    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: default avatarAnton Blanchard <anton@samba.org>
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    c81b812a
topology.h 2.29 KB