+static int super_written(struct bio *bio, unsigned int bytes_done, int error)
+{
+ mdk_rdev_t *rdev = bio->bi_private;
+ if (bio->bi_size)
+ return 1;
+
+ if (error || !test_bit(BIO_UPTODATE, &bio->bi_flags))
+ md_error(rdev->mddev, rdev);
+
+ if (atomic_dec_and_test(&rdev->mddev->pending_writes))
+ wake_up(&rdev->mddev->sb_wait);
+ bio_put(bio);
+ return 0;
+}
+
+void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,
+ sector_t sector, int size, struct page *page)
+{
+ /* write first size bytes of page to sector of rdev
+ * Increment mddev->pending_writes before returning
+ * and decrement it on completion, waking up sb_wait
+ * if zero is reached.
+ * If an error occurred, call md_error
+ */
+ struct bio *bio = bio_alloc(GFP_NOIO, 1);
+
+ bio->bi_bdev = rdev->bdev;
+ bio->bi_sector = sector;
+ bio_add_page(bio, page, size, 0);
+ bio->bi_private = rdev;
+ bio->bi_end_io = super_written;
+ atomic_inc(&mddev->pending_writes);
+ submit_bio((1<<BIO_RW)|(1<<BIO_RW_SYNC), bio);
+}
+