user_uffdio_copy 1706 fs/userfaultfd.c struct uffdio_copy __user *user_uffdio_copy; user_uffdio_copy 1709 fs/userfaultfd.c user_uffdio_copy = (struct uffdio_copy __user *) arg; user_uffdio_copy 1716 fs/userfaultfd.c if (copy_from_user(&uffdio_copy, user_uffdio_copy, user_uffdio_copy 1741 fs/userfaultfd.c if (unlikely(put_user(ret, &user_uffdio_copy->copy)))