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authorChristoph Hellwig <hch@lst.de>2014-02-10 20:29:00 +0400
committerJens Axboe <axboe@fb.com>2014-02-10 20:29:00 +0400
commit18741986a4b1dc4b1f171634c4191abc3b0fa023 (patch)
treed0f632fa9b205d5fbcc76ff1cf8cba63112c7da8 /block/blk-mq.h
parentce2c350b2cfe5b5ca5023a6b1ec4d21821d39add (diff)
downloadlinux-18741986a4b1dc4b1f171634c4191abc3b0fa023.tar.xz
blk-mq: rework flush sequencing logic
Witch to using a preallocated flush_rq for blk-mq similar to what's done with the old request path. This allows us to set up the request properly with a tag from the actually allowed range and ->rq_disk as needed by some drivers. To make life easier we also switch to dynamic allocation of ->flush_rq for the old path. This effectively reverts most of "blk-mq: fix for flush deadlock" and "blk-mq: Don't reserve a tag for flush request" Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq.h')
-rw-r--r--block/blk-mq.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-mq.h b/block/blk-mq.h
index f29b645f0e1c..ed0035cd458e 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -28,6 +28,7 @@ void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
void blk_mq_init_flush(struct request_queue *q);
void blk_mq_drain_queue(struct request_queue *q);
void blk_mq_free_queue(struct request_queue *q);
+void blk_mq_rq_init(struct blk_mq_hw_ctx *hctx, struct request *rq);
/*
* CPU hotplug helpers