• Tejun Heo's avatar
    x86: Replace apic->apicid_to_node() with ->x86_32_numa_cpu_node() · 89e5dc21
    Tejun Heo authored
    apic->apicid_to_node() is 32bit specific apic operation which
    determines NUMA node for a CPU.  Depending on the APIC
    implementation, it can be easier to determine NUMA node from
    either physical or logical apicid.  Currently,
    ->apicid_to_node() takes @logical_apicid and calls
    hard_smp_processor_id() if the physical apicid is needed.
    
    This prevents NUMA mapping from being queried from a different
    CPU, which in turn makes it impossible to initialize NUMA
    mapping before SMP bringup.
    
    This patch replaces apic->apicid_to_node() with
    ->x86_32_numa_cpu_node() which takes @cpu, from which both
    logical and physical apicids can easily be determined.  While at
    it, drop duplicate implementations from bigsmp_32 and summit_32,
    and use the default one.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Reviewed-by: default avatarPekka Enberg <penberg@kernel.org>
    Cc: eric.dumazet@gmail.com
    Cc: yinghai@kernel.org
    Cc: brgerst@gmail.com
    Cc: gorcunov@gmail.com
    Cc: shaohui.zheng@intel.com
    Cc: rientjes@google.com
    LKML-Reference: <1295789862-25482-13-git-send-email-tj@kernel.org>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    89e5dc21
apic_noop.c 4.72 KB