printk("page_dir == %016lx\n", (unsigned long) page_dir);
pgd = pgd_offset(t->mm, addr);
printk("pgd == %016lx\n", (unsigned long) pgd);
printk("page_dir == %016lx\n", (unsigned long) page_dir);
pgd = pgd_offset(t->mm, addr);
printk("pgd == %016lx\n", (unsigned long) pgd);