Linux-libre 4.6.2-gnu

1 files changed, 27 insertions, 3 deletions

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index cb5d0daf5..f9e8f0bef 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -932,6 +932,30 @@ struct target_type *dm_table_get_immutable_target_type(struct dm_table *t)
 	return t->immutable_target_type;
 }
 
+struct dm_target *dm_table_get_immutable_target(struct dm_table *t)
+{
+	/* Immutable target is implicitly a singleton */
+	if (t->num_targets > 1 ||
+	    !dm_target_is_immutable(t->targets[0].type))
+		return NULL;
+
+	return t->targets;
+}
+
+struct dm_target *dm_table_get_wildcard_target(struct dm_table *t)
+{
+	struct dm_target *uninitialized_var(ti);
+	unsigned i = 0;
+
+	while (i < dm_table_get_num_targets(t)) {
+		ti = dm_table_get_target(t, i++);
+		if (dm_target_is_wildcard(ti->type))
+			return ti;
+	}
+
+	return NULL;
+}
+
 bool dm_table_request_based(struct dm_table *t)
 {
 	return __table_type_request_based(dm_table_get_type(t));
@@ -945,7 +969,7 @@ bool dm_table_mq_request_based(struct dm_table *t)
 static int dm_table_alloc_md_mempools(struct dm_table *t, struct mapped_device *md)
 {
 	unsigned type = dm_table_get_type(t);
-	unsigned per_bio_data_size = 0;
+	unsigned per_io_data_size = 0;
 	struct dm_target *tgt;
 	unsigned i;
 
@@ -957,10 +981,10 @@ static int dm_table_alloc_md_mempools(struct dm_table *t, struct mapped_device *
 	if (type == DM_TYPE_BIO_BASED)
 		for (i = 0; i < t->num_targets; i++) {
 			tgt = t->targets + i;
-			per_bio_data_size = max(per_bio_data_size, tgt->per_bio_data_size);
+			per_io_data_size = max(per_io_data_size, tgt->per_io_data_size);
 		}
 
-	t->mempools = dm_alloc_md_mempools(md, type, t->integrity_supported, per_bio_data_size);
+	t->mempools = dm_alloc_md_mempools(md, type, t->integrity_supported, per_io_data_size);
 	if (!t->mempools)
 		return -ENOMEM;