+ if (!test_bit(BarriersNotsupp, &rdev->flags)) {
+ struct bio *rbio;
+ rw |= (1<<BIO_RW_BARRIER);
+ rbio = bio_clone(bio, GFP_NOIO);
+ rbio->bi_private = bio;
+ rbio->bi_end_io = super_written_barrier;
+ submit_bio(rw, rbio);
+ } else
+ submit_bio(rw, bio);
+}
+
+void md_super_wait(mddev_t *mddev)
+{
+ /* wait for all superblock writes that were scheduled to complete.
+ * if any had to be retried (due to BARRIER problems), retry them
+ */
+ DEFINE_WAIT(wq);
+ for(;;) {
+ prepare_to_wait(&mddev->sb_wait, &wq, TASK_UNINTERRUPTIBLE);
+ if (atomic_read(&mddev->pending_writes)==0)
+ break;
+ while (mddev->biolist) {
+ struct bio *bio;
+ spin_lock_irq(&mddev->write_lock);
+ bio = mddev->biolist;
+ mddev->biolist = bio->bi_next ;
+ bio->bi_next = NULL;
+ spin_unlock_irq(&mddev->write_lock);
+ submit_bio(bio->bi_rw, bio);
+ }
+ schedule();
+ }
+ finish_wait(&mddev->sb_wait, &wq);