diff options
| author | Christoph Hellwig <hch@lst.de> | 2014-04-14 10:30:07 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-04-15 14:03:02 -0600 |
| commit | 9d74e25737d73e93ccddeb5a61bcd56b7b8eb57b (patch) | |
| tree | c36c53290f8b5ed7f1ae9a89b534a9c3155c0491 /drivers/block/virtio_blk.c | |
| parent | 742ee69b92d9559e968f70cf0a49157866f8fbef (diff) | |
| download | lwn-9d74e25737d73e93ccddeb5a61bcd56b7b8eb57b.tar.gz lwn-9d74e25737d73e93ccddeb5a61bcd56b7b8eb57b.zip | |
blk-mq: do not initialize req->special
Drivers can reach their private data easily using the blk_mq_rq_to_pdu
helper and don't need req->special. By not initializing it code can
be simplified nicely, and we also shave off a few more instructions from
the I/O path.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/virtio_blk.c')
| -rw-r--r-- | drivers/block/virtio_blk.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 6d8a87f252de..c7d02bc9d945 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -112,7 +112,7 @@ static int __virtblk_add_req(struct virtqueue *vq, static inline void virtblk_request_done(struct request *req) { - struct virtblk_req *vbr = req->special; + struct virtblk_req *vbr = blk_mq_rq_to_pdu(req); int error = virtblk_result(vbr); if (req->cmd_type == REQ_TYPE_BLOCK_PC) { @@ -154,7 +154,7 @@ static void virtblk_done(struct virtqueue *vq) static int virtio_queue_rq(struct blk_mq_hw_ctx *hctx, struct request *req) { struct virtio_blk *vblk = hctx->queue->queuedata; - struct virtblk_req *vbr = req->special; + struct virtblk_req *vbr = blk_mq_rq_to_pdu(req); unsigned long flags; unsigned int num; const bool last = (req->cmd_flags & REQ_END) != 0; @@ -501,7 +501,7 @@ static int virtblk_init_vbr(void *data, struct blk_mq_hw_ctx *hctx, struct request *rq, unsigned int nr) { struct virtio_blk *vblk = data; - struct virtblk_req *vbr = rq->special; + struct virtblk_req *vbr = blk_mq_rq_to_pdu(rq); sg_init_table(vbr->sg, vblk->sg_elems); return 0; |