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    SubjectRe: [Hotplug_sig] [patch 1/1] Hot plug CPU to support physical add of new processors (i386)
    Natalie.Protasevich@unisys.com wrote:

    > +#ifdef CONFIG_HOTPLUG_CPU
    > + if (cpu_online(cpu)) {
    > +#else
    > if (cpu_online(cpu) || !cpu_present(cpu)) {
    > +#endif
    > ret = -EINVAL;
    > goto out;
    > }

    Why this change? I think the cpu_present check is needed for ppc64
    since it has non-present cpus in sysfs.

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