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    SubjectRe: [RFC, 3/7] NUMA hotplug emulator
    > Pls. replace it with following code:
    >
    > +#ifdef CONFIG_NODE_HOTPLUG_EMU
    > +static ssize_t store_nodes_probe(struct sysdev_class *class,
    > + struct sysdev_class_attribute *attr,
    > + const char *buf, size_t count)
    > +{
    > + long nid;
    > + int ret;
    > +
    > + ret = strict_strtol(buf, 0, &nid);
    > + if (ret == -EINVAL)
    > + return ret;
    > +
    > + ret = hotadd_hidden_nodes(nid);
    > + if (!ret)
    > + return count;
    > + else
    > + return -EIO;
    > +}
    > +#endif

    How about this?

    err = strict_strtol(buf, 0, &nid);
    if (err < 0)
    return err;

    err = hotadd_hidden_nodes(nid);
    if (err < 0)
    return err;

    return count;

    Thanks,
    Fengguang


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