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authorChristoph Hellwig <hch@lst.de>2014-04-14 10:30:07 +0200
committerJens Axboe <axboe@fb.com>2014-04-15 14:03:02 -0600
commit9d74e25737d73e93ccddeb5a61bcd56b7b8eb57b (patch)
treec36c53290f8b5ed7f1ae9a89b534a9c3155c0491 /drivers/block/null_blk.c
parent742ee69b92d9559e968f70cf0a49157866f8fbef (diff)
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/null_blk.c')
-rw-r--r--drivers/block/null_blk.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index 091b9ea14feb..71df69d90900 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -226,7 +226,7 @@ static void null_cmd_end_timer(struct nullb_cmd *cmd)
static void null_softirq_done_fn(struct request *rq)
{
- end_cmd(rq->special);
+ end_cmd(blk_mq_rq_to_pdu(rq));
}
static inline void null_handle_cmd(struct nullb_cmd *cmd)
@@ -311,7 +311,7 @@ static void null_request_fn(struct request_queue *q)
static int null_queue_rq(struct blk_mq_hw_ctx *hctx, struct request *rq)
{
- struct nullb_cmd *cmd = rq->special;
+ struct nullb_cmd *cmd = blk_mq_rq_to_pdu(rq);
cmd->rq = rq;
cmd->nq = hctx->driver_data;