From 127276c6ce5a30fcc806b7fe53015f4f89b62956 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@redhat.com>
Date: Sun, 8 Apr 2018 17:48:13 +0800
Subject: [PATCH] blk-mq: reimplement blk_mq_hw_queue_mapped

Now the actual meaning of queue mapped is that if there is any online
CPU mapped to this hctx, so implement blk_mq_hw_queue_mapped() in this
way.

Cc: Stefan Haberland <sth@linux.vnet.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-mq.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-mq.h b/block/blk-mq.h
index 88c558f71819..502af371b83b 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -181,7 +181,7 @@ static inline bool blk_mq_hctx_stopped(struct blk_mq_hw_ctx *hctx)
 
 static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx *hctx)
 {
-	return hctx->nr_ctx && hctx->tags;
+	return cpumask_first_and(hctx->cpumask, cpu_online_mask) < nr_cpu_ids;
 }
 
 void blk_mq_in_flight(struct request_queue *q, struct hd_struct *part,