So it can be used by fabrics driver also.
Signed-off-by: NMing Lin <ming.l@samsung.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: NKeith Busch <keith.bsuch@intel.com>
Signed-off-by: NJens Axboe <axboe@fb.com>