Signed-off-by: NDan Williams <dan.j.williams@intel.com>
[hch: split from a larger patch by Dan]
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NJens Axboe <axboe@fb.com>