From 681cc5e8667e8579a2da8fa4090c48a2d73fc3bb Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Wed, 7 Oct 2020 16:41:01 -0400 Subject: dm: fix request-based DM to not bounce through indirect dm_submit_bio It is unnecessary to force request-based DM to call into bio-based dm_submit_bio (via indirect disk->fops->submit_bio) only to have it then call blk_mq_submit_bio(). Fix this by establishing a request-based DM block_device_operations (dm_rq_blk_dops, which doesn't have .submit_bio) and update dm_setup_md_queue() to set md->disk->fops to it for DM_TYPE_REQUEST_BASED. Remove DM_TYPE_REQUEST_BASED conditional in dm_submit_bio and unexport blk_mq_submit_bio. Fixes: c62b37d96b6eb ("block: move ->make_request_fn to struct block_device_operations") Signed-off-by: Mike Snitzer --- block/blk-mq.c | 1 - 1 file changed, 1 deletion(-) (limited to 'block/blk-mq.c') diff --git a/block/blk-mq.c b/block/blk-mq.c index 176698b2285b..0191fc0447f7 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2265,7 +2265,6 @@ queue_exit: blk_queue_exit(q); return BLK_QC_T_NONE; } -EXPORT_SYMBOL_GPL(blk_mq_submit_bio); /* only for request based dm */ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, unsigned int hctx_idx) -- cgit v1.2.3