get_user_pages_unlocked
gup_rc = get_user_pages_unlocked(mem_region.userspace_addr + memory_size, 1,
long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages,
EXPORT_SYMBOL(get_user_pages_unlocked);
npages = get_user_pages_unlocked(kfp->hva, 1, &page, flags);