On Thu, Oct 29, 2020 at 9:57 AM Christoph Hellwig hch@infradead.org wrote:

Maybe I'm missing something, but shouldn't follow_pfn be unexported at the end of the series?

kvm is a legit user and modular afaict. But since you can't use this without an mmu_notifier anyway (or digging around in pagetable locking), maybe it should be EXPORT_SYMBOL_GPL now at least? -Daniel