+static void *
+cio_ignore_proc_seq_next(struct seq_file *s, void *it, loff_t *offset)
+{
+ struct ccwdev_iter *iter;
+
+ if (*offset >= (__MAX_SUBCHANNEL + 1) * (__MAX_SSID + 1))
+ return NULL;
+ iter = it;
+ if (iter->devno == __MAX_SUBCHANNEL) {
+ iter->devno = 0;
+ iter->ssid++;
+ if (iter->ssid > __MAX_SSID)
+ return NULL;
+ } else
+ iter->devno++;
+ (*offset)++;
+ return iter;
+}
+
+static int
+cio_ignore_proc_seq_show(struct seq_file *s, void *it)
+{
+ struct ccwdev_iter *iter;
+
+ iter = it;
+ if (!is_blacklisted(iter->ssid, iter->devno))
+ /* Not blacklisted, nothing to output. */
+ return 0;
+ if (!iter->in_range) {
+ /* First device in range. */
+ if ((iter->devno == __MAX_SUBCHANNEL) ||
+ !is_blacklisted(iter->ssid, iter->devno + 1))
+ /* Singular device. */
+ return seq_printf(s, "0.%x.%04x\n",
+ iter->ssid, iter->devno);
+ iter->in_range = 1;
+ return seq_printf(s, "0.%x.%04x-", iter->ssid, iter->devno);
+ }
+ if ((iter->devno == __MAX_SUBCHANNEL) ||
+ !is_blacklisted(iter->ssid, iter->devno + 1)) {
+ /* Last device in range. */
+ iter->in_range = 0;
+ return seq_printf(s, "0.%x.%04x\n", iter->ssid, iter->devno);
+ }
+ return 0;
+}
+
+static ssize_t
+cio_ignore_write(struct file *file, const char __user *user_buf,
+ size_t user_len, loff_t *offset)