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authorJens Axboe <axboe@fb.com>2014-05-28 03:46:48 +0400
committerJens Axboe <axboe@fb.com>2014-05-28 03:46:48 +0400
commit95f096849932fe5eaa7bfec887530cf556744a76 (patch)
tree66f66e18fb1ae13d9e822cc14e4c3da6a59d0681 /include/linux/blk-mq.h
parentf14bbe77a96bb979dc539d8308ee18a9363a544f (diff)
downloadlinux-95f096849932fe5eaa7bfec887530cf556744a76.tar.xz
blk-mq: allow non-softirq completions
Right now we export two ways of completing a request: 1) blk_mq_complete_request(). This uses an IPI (if needed) and completes through q->softirq_done_fn(). It also works with timeouts. 2) blk_mq_end_io(). This completes inline, and ignores any timeout state of the request. Let blk_mq_complete_request() handle non-softirq_done_fn completions as well, by just completing inline. If a driver has enough completion ports to place completions correctly, it need not define a mq_ops->complete() and we can avoid an indirect function call by doing the completion inline. Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/blk-mq.h')
-rw-r--r--include/linux/blk-mq.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index afeb93496907..1dfeb1529a61 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -173,6 +173,10 @@ void __blk_mq_end_io(struct request *rq, int error);
void blk_mq_requeue_request(struct request *rq);
+/*
+ * Complete request through potential IPI for right placement. Driver must
+ * have defined a mq_ops->complete() hook for this.
+ */
void blk_mq_complete_request(struct request *rq);
void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx);