diff options
| author | Christoph Hellwig <hch@lst.de> | 2022-02-15 13:05:36 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-02-17 05:39:09 +0300 |
| commit | 248c793359daacd826a7507a258ffe41653efef7 (patch) | |
| tree | 069d8709c9dcda5de41ec5ad7b62f0375bd9859a /block/blk-mq.c | |
| parent | f122d103b564e5fb7c82de902c6f8f6cbdf50ec9 (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.c | 2 |
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. |