summaryrefslogtreecommitdiff
path: root/block/blk-mq.c
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2022-02-15 11:05:36 +0100
committerJens Axboe <axboe@kernel.dk>2022-02-16 19:39:09 -0700
commit248c793359daacd826a7507a258ffe41653efef7 (patch)
tree069d8709c9dcda5de41ec5ad7b62f0375bd9859a /block/blk-mq.c
parentf122d103b564e5fb7c82de902c6f8f6cbdf50ec9 (diff)
blk-mq: make the blk-mq stacking code optional
The code to stack blk-mq drivers is only used by dm-multipath, and will preferably stay that way. Make it optional and only selected by device mapper, so that the buildbots more easily catch abuses like the one that slipped in in the ufs driver in the last merged window. Another positive side effects is that kernel builds without device mapper shrink a little bit as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Snitzer <snitzer@redhat.com> Link: https://lore.kernel.org/r/20220215100540.3892965-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
-rw-r--r--block/blk-mq.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 6c59ffe765fd..db62d34afb63 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2840,6 +2840,7 @@ void blk_mq_submit_bio(struct bio *bio)
blk_mq_try_issue_directly(rq->mq_hctx, rq));
}
+#ifdef CONFIG_BLK_MQ_STACKING
/**
* blk_cloned_rq_check_limits - Helper function to check a cloned request
* for the new queue limits
@@ -3017,6 +3018,7 @@ free_and_out:
return -ENOMEM;
}
EXPORT_SYMBOL_GPL(blk_rq_prep_clone);
+#endif /* CONFIG_BLK_MQ_STACKING */
/*
* Steal bios from a request and add them to a bio list.