-/* 2.6.24 API change */
-#ifdef HAVE_2ARGS_BIO_END_IO_T
-# define BIO_END_IO_PROTO(fn, x, y, z) static void fn(struct bio *x, int z)
-# define BIO_END_IO_RETURN(rc) return
-#else
-# define BIO_END_IO_PROTO(fn, x, y, z) static int fn(struct bio *x, \
- unsigned int y, int z)
-# define BIO_END_IO_RETURN(rc) return rc
-#endif /* HAVE_2ARGS_BIO_END_IO_T */
-
-/* 2.6.28 API change */
-#ifdef HAVE_OPEN_BDEV_EXCLUSIVE
-# define vdev_bdev_open(path, md, hld) open_bdev_exclusive(path, md, hld)
-# define vdev_bdev_close(bdev, md) close_bdev_exclusive(bdev, md)
-#else
-# define vdev_bdev_open(path, md, hld) open_bdev_excl(path, md, hld)
-# define vdev_bdev_close(bdev, md) close_bdev_excl(bdev)
-#endif /* HAVE_OPEN_BDEV_EXCLUSIVE */
-
-/* 2.6.22 API change */
-#ifdef HAVE_1ARG_INVALIDATE_BDEV
-# define vdev_bdev_invalidate(bdev) invalidate_bdev(bdev)
-#else
-# define vdev_bdev_invalidate(bdev) invalidate_bdev(bdev, 1)
-#endif /* HAVE_1ARG_INVALIDATE_BDEV */
-
-/* 2.6.30 API change */
-#ifdef HAVE_BDEV_LOGICAL_BLOCK_SIZE
-# define vdev_bdev_block_size(bdev) bdev_logical_block_size(bdev)
-#else
-# define vdev_bdev_block_size(bdev) bdev_hardsect_size(bdev)
-#endif
-