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The pages >> + * marked for migration are migrated by kmigrated kernel thread. >> + * >> + * Return: 0 on success and -EINVAL on failure to record the access. >> + */ >> +int pghot_record_access(unsigned long pfn, int nid, int src, unsigned long now) >> +{ > [...] >> +} > > This needs a EXPORT_SYMBOL_GPL(pghot_record_access) for any module based > sources. Ah I didn't see that till now. CXL driver would need that. Thanks will add. Regards, Bharata.