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-rw-r--r--block/Kconfig3
-rw-r--r--block/blk-mq.c2
2 files changed, 5 insertions, 0 deletions
diff --git a/block/Kconfig b/block/Kconfig
index 205f8d01c695..168b873eb666 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -230,6 +230,9 @@ config BLK_PM
config BLOCK_HOLDER_DEPRECATED
bool
+config BLK_MQ_STACKING
+ bool
+
source "block/Kconfig.iosched"
endif # BLOCK
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.