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authorKeith Busch <keith.busch@intel.com>2018-07-23 08:37:50 -0600
committerJens Axboe <axboe@kernel.dk>2018-07-24 14:41:50 -0600
commit0fc09f920983f61be625658c62cc40ac25a7b3a5 (patch)
tree1ecdf3fec43fd6b9549509a768ae509ddb31a80e /include
parent8f3ea35929a0806ad1397db99a89ffee0140822a (diff)
download96b-common-0fc09f920983f61be625658c62cc40ac25a7b3a5.tar.gz
blk-mq: export setting request completion state
This is preparing for drivers that want to directly alter the state of their requests. No functional change here. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
-rw-r--r--include/linux/blk-mq.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index e3147eb74222..ca3f2c2edd85 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -287,6 +287,20 @@ void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues);
void blk_mq_quiesce_queue_nowait(struct request_queue *q);
+/**
+ * blk_mq_mark_complete() - Set request state to complete
+ * @rq: request to set to complete state
+ *
+ * Returns true if request state was successfully set to complete. If
+ * successful, the caller is responsibile for seeing this request is ended, as
+ * blk_mq_complete_request will not work again.
+ */
+static inline bool blk_mq_mark_complete(struct request *rq)
+{
+ return cmpxchg(&rq->state, MQ_RQ_IN_FLIGHT, MQ_RQ_COMPLETE) ==
+ MQ_RQ_IN_FLIGHT;
+}
+
/*
* Driver command data is immediately after the request. So subtract request
* size to get back to the original request, add request size to get the PDU.