linux-phytec-ti

aoe: replace ->special use with private data in the request

Makes the code a whole lot easier to read.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>