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Date: Mon, 15 Sep 2014 21:11:08 +0800 From: Ming Lei <ming.lei@...onical.com> To: Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org Cc: Christoph Hellwig <hch@....de>, Ming Lei <ming.lei@...onical.com> Subject: [PATCH v4 04/10] 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@....de> Signed-off-by: Ming Lei <ming.lei@...onical.com> --- block/blk-flush.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/block/blk-flush.c b/block/blk-flush.c index a5b2a00..a59dd1a 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -225,7 +225,7 @@ 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]; @@ -283,6 +283,7 @@ 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)) @@ -300,16 +301,16 @@ 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) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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