1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/s390/cio/idset.c b/drivers/s390/cio/idset.c
index cf8f24a4b5eb..77e42cb127bb 100644
--- a/drivers/s390/cio/idset.c
+++ b/drivers/s390/cio/idset.c
@@ -110,3 +110,13 @@ int idset_sch_get_first(struct idset *set, struct subchannel_id *schid)
         }
         return rc;
 }
+
+int idset_is_empty(struct idset *set)
+{
+        int bitnum;
+
+        bitnum = find_first_bit(set->bitmap, set->num_ssid * set->num_id);
+        if (bitnum >= set->num_ssid * set->num_id)
+                return 1;
+        return 0;
+}