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-rw-r--r--block/bio.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c
index 5f7563598b1c..db9a40e9a136 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1997,6 +1997,24 @@ bad:
}
EXPORT_SYMBOL(bioset_init);
+/*
+ * Initialize and setup a new bio_set, based on the settings from
+ * another bio_set.
+ */
+int bioset_init_from_src(struct bio_set *bs, struct bio_set *src)
+{
+ int flags;
+
+ flags = 0;
+ if (src->bvec_pool.min_nr)
+ flags |= BIOSET_NEED_BVECS;
+ if (src->rescue_workqueue)
+ flags |= BIOSET_NEED_RESCUER;
+
+ return bioset_init(bs, src->bio_pool.min_nr, src->front_pad, flags);
+}
+EXPORT_SYMBOL(bioset_init_from_src);
+
#ifdef CONFIG_BLK_CGROUP
/**