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| 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 /block/blk-flush.c | |
| parent | 742ee69b92d9559e968f70cf0a49157866f8fbef (diff) | |
| download | linux-stable-9d74e25737d73e93ccddeb5a61bcd56b7b8eb57b.tar.gz linux-stable-9d74e25737d73e93ccddeb5a61bcd56b7b8eb57b.tar.bz2 linux-stable-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 'block/blk-flush.c')
| -rw-r--r-- | block/blk-flush.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/block/blk-flush.c b/block/blk-flush.c index 77f20458910c..0e42adcfb55e 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -306,22 +306,16 @@ static bool blk_kick_flush(struct request_queue *q) */ q->flush_pending_idx ^= 1; + blk_rq_init(q, q->flush_rq); if (q->mq_ops) { - struct blk_mq_ctx *ctx = first_rq->mq_ctx; - struct blk_mq_hw_ctx *hctx = q->mq_ops->map_queue(q, ctx->cpu); - - blk_mq_rq_init(hctx, q->flush_rq); - q->flush_rq->mq_ctx = ctx; - /* * Reuse the tag value from the fist waiting request, * with blk-mq the tag is generated during request * allocation and drivers can rely on it being inside * the range they asked for. */ + q->flush_rq->mq_ctx = first_rq->mq_ctx; q->flush_rq->tag = first_rq->tag; - } else { - blk_rq_init(q, q->flush_rq); } q->flush_rq->cmd_type = REQ_TYPE_FS; |