* and do_lo_send_write().
  */
 static int __do_lo_send_write(struct file *file,
-               u8 __user *buf, const int len, loff_t pos)
+               u8 *buf, const int len, loff_t pos)
 {
        ssize_t bw;
        mm_segment_t old_fs = get_fs();
                struct bio_vec *bvec, int bsize, loff_t pos, struct page *page)
 {
        ssize_t bw = __do_lo_send_write(lo->lo_backing_file,
-                       (u8 __user *)kmap(bvec->bv_page) + bvec->bv_offset,
+                       kmap(bvec->bv_page) + bvec->bv_offset,
                        bvec->bv_len, pos);
        kunmap(bvec->bv_page);
        cond_resched();
                        bvec->bv_offset, bvec->bv_len, pos >> 9);
        if (likely(!ret))
                return __do_lo_send_write(lo->lo_backing_file,
-                               (u8 __user *)page_address(page), bvec->bv_len,
+                               page_address(page), bvec->bv_len,
                                pos);
        printk(KERN_ERR "loop: Transfer error at byte offset %llu, "
                        "length %i.\n", (unsigned long long)pos, bvec->bv_len);