Btrfs: bio_endio support for linux 2.6.23 and older.

bio_endio() changed prototype on linux 2.6.24, support older kernels
using the older prototype.
Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/disk-io.c

@@ -949,11 +949,14 @@ void btrfs_end_io_csum(struct work_struct *work)
 		bio->bi_private = end_io_wq->private;
 		bio->bi_end_io = end_io_wq->end_io;
 		kfree(end_io_wq);
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23)
+		bio_endio(bio, bio->bi_size, err);
+#else
 		bio_endio(bio, error);
+#endif
 	}
 }
 
-
 struct btrfs_root *open_ctree(struct super_block *sb,
 			      struct btrfs_fs_devices *fs_devices)
 {

fs/btrfs/volumes.c

@@ -960,7 +960,11 @@ static int end_bio_multi_stripe(struct bio *bio,
 			err = multi->error;
 		kfree(multi);
 
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23)
+		bio_endio(bio, bio->bi_size, err);
+#else
 		bio_endio(bio, err);
+#endif
 	} else {
 		bio_put(bio);
 	}