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| author | Ming Lei <ming.lei@canonical.com> | 2014-09-25 23:23:42 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-09-25 15:22:38 -0600 |
| commit | 7ddab5de5b80d3111f9e6765714e728b2c4f1c07 (patch) | |
| tree | 35c64aea8aa76af4a375102458f39417473b545a /block/blk-flush.c | |
| parent | 3c09676c12b1dabf84acbb5849bfc54acadaf092 (diff) | |
| download | lwn-7ddab5de5b80d3111f9e6765714e728b2c4f1c07.tar.gz lwn-7ddab5de5b80d3111f9e6765714e728b2c4f1c07.zip | |
block: avoid to use q->flush_rq directly
This patch trys to use local variable to access flush request,
so that we can convert to per-queue flush machinery a bit easier.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-flush.c')
| -rw-r--r-- | block/blk-flush.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/block/blk-flush.c b/block/blk-flush.c index a49ffbdcfcdc..caf44756d329 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -223,7 +223,7 @@ static void flush_end_io(struct request *flush_rq, int error) if (q->mq_ops) { spin_lock_irqsave(&q->mq_flush_lock, flags); - q->flush_rq->tag = -1; + flush_rq->tag = -1; } running = &q->flush_queue[q->flush_running_idx]; @@ -281,6 +281,7 @@ static bool blk_kick_flush(struct request_queue *q) struct list_head *pending = &q->flush_queue[q->flush_pending_idx]; struct request *first_rq = list_first_entry(pending, struct request, flush.list); + struct request *flush_rq = q->flush_rq; /* C1 described at the top of this file */ if (q->flush_pending_idx != q->flush_running_idx || list_empty(pending)) @@ -298,16 +299,16 @@ static bool blk_kick_flush(struct request_queue *q) */ q->flush_pending_idx ^= 1; - blk_rq_init(q, q->flush_rq); + blk_rq_init(q, flush_rq); if (q->mq_ops) - blk_mq_clone_flush_request(q->flush_rq, first_rq); + blk_mq_clone_flush_request(flush_rq, first_rq); - q->flush_rq->cmd_type = REQ_TYPE_FS; - q->flush_rq->cmd_flags = WRITE_FLUSH | REQ_FLUSH_SEQ; - q->flush_rq->rq_disk = first_rq->rq_disk; - q->flush_rq->end_io = flush_end_io; + flush_rq->cmd_type = REQ_TYPE_FS; + flush_rq->cmd_flags = WRITE_FLUSH | REQ_FLUSH_SEQ; + flush_rq->rq_disk = first_rq->rq_disk; + flush_rq->end_io = flush_end_io; - return blk_flush_queue_rq(q->flush_rq, false); + return blk_flush_queue_rq(flush_rq, false); } static void flush_data_end_io(struct request *rq, int error) |