Use the sgl_alloc_order() and sgl_free() functions instead of open
coding these functions.
Signed-off-by: NBart Van Assche <bart.vanassche@wdc.com>
Acked-by: NNicholas A. Bellinger <nab@linux-iscsi.org>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: NJens Axboe <axboe@kernel.dk>